This document provides the procedure for a chemistry lab experiment involving chemical reactions. The experiment involves synthesizing calcium carbonate and determining the limiting reagent and percent yield. Students will carry out two trials of the reaction of calcium chloride and potassium carbonate solutions to produce calcium carbonate precipitate. They will calculate the theoretical and actual yields, identify the limiting reagent, and calculate the percent yield for each trial. The procedure provides detailed steps for setting up the reaction, filtering and drying the product, collecting data, and performing calculations to analyze the results.
Lab 9 Chemical Reactions IIPre-lab Questions1. What is a limi.docxsmile790243
Lab 9: Chemical Reactions II
Pre-lab Questions
1. What is a limiting reagent?
2. A student used 7.15 g of CaCl2 and 9.25 g of K2CO3 to make CaCO3. The actual yield was 6.15 g of CaCO3. Calculate the limiting reagent and the percent yield.
Experiment: Synthesis of Garden Lime
Procedure
**Take photographs of your experiment set up and your results. Submit them with your laboratory report.**
1. Table 1 provides an example set of data for 1.0 g CaCl2.
2. For Trial 1, weigh into a 250 mL beaker the amount of calcium chloride (CaCl2) shown in Table 1. Record the exact mass you weigh out in the Trial 1 column of the Data section.
3. Measure 50.0 mL of distilled water into a 100 mL graduated cylinder. Pour the water into the 250 mL beaker with the calcium chloride.
4. Stir the solution with a stirring rod until all of the calcium chloride is dissolved.
5. Weigh out 2.5 g of potassium carbonate (K2CO3) in a 50 mL beaker. Record the exact mass in the Data section.
6. Measure 25.0 mL of distilled water into a 100 mL graduated cylinder. Add the water into the 50 mL beaker containing the potassium carbonate.
7. Stir the potassium carbonate in the distilled water with a stirring rod until it is all dissolved.
8. Pour the K2CO3 solution into the 250 mL beaker that has the CaCl2 solution. Rinse the beaker that contained the K2CO3 with a few mL of water and add this to the CaCl2 solution. Stir the mixture.
9. As soon as the reaction begins, record your observations in the Data section. Continue stirring until you see no more precipitate forming.
10. Set up the funnel in the Erlenmeyer flask as shown in Figure 2.
HINT: Do NOT begin filtering yet!
11. Zero the scale and weigh a piece of filter paper and a watch glass. Record the masses of both items in the Data section.
12. Prepare a filtering funnel as shown in Figure 2: fold a piece of filter paper in half twice to make quarters, and open the paper to make a small cone (three quarters are open on one side and one quarter is on the opposite side). Place the paper cone into the funnel and hold it in place with your fingers. Pour a small amount of distilled water through the paper to secure it inside the funnel.
13. Filter the mixture by pouring it into the filter paper in the funnel. Use the stirring rod and distilled water in a wash bottle to transfer the entire solid into the filter paper.
HINT: For best results, be sure to transfer all of the precipitate into the filter paper. Use a rubber policeman if it is available to help with the transfer.
14. Rinse the remaining solid in the filter paper twice with distilled water from a wash bottle to rinse off excess sodium chloride (NaCl). After all the liquid has filtered through, rinse the product with approximately 5 mL of ethanol to aid in its drying. Allow the ethanol to completely finish filtering through the paper.
15. Remove the filter paper carefully so as to not lose any product. Gently unfold the filter paper and lay it flat on the pre-weighed wat ...
Unit 4 Lab StoichiometryCHEM 1806Purpose To practice the conce.docxdickonsondorris
Unit 4 Lab: StoichiometryCHEM 1806
Purpose: To practice the concept of Stoichiometry
Materials: Student Supplied – Distilled water, paper towels, small paper cup, mug
LabPaq materials: 100 mL glass beaker, Funnel, 25 mL cylinder, Goggles, Digital Scale, Weighing boat, 2.5 g Calcium chloride, dehydrate, Filter paper, 2 g Sodium carbonate.
Procedure:
1. While wearing goggles, weigh out 1.0 g CaCl2 and put it into the 100 mL beaker. Record the actual mass of CaCl2 you are using in Table 1.
2. Add 25 mL of distilled water to the beaker and stir. This is now the “Calcium chloride solution”
3. Calculate how much sodium carbonate you will need for a full reaction. Write that calculation in the Results and Discussion section.
4. Weigh out the calculated amount of Na2CO3 and put it in a small paper cup. (Record actual mass in Data Table 1)
5. Add 25 mL distilled water to the paper cup and stir to make “sodium carbonate solution.”
6. Pour the sodium carbonate solution into the beaker with the calcium chloride solution.
7. Record observations. Write out the reaction of what occurred in the results section. (The solid is calcium carbonate.)
8. Fold the filter paper in half, then in quarters. Record the mass of the filter paper.
9. Place the filter paper in the funnel and open one side.
10. Place the funnel in a mug or other cup to balance it.
11. Carefully swirl and pour the contents of the beaker into the filter paper. (Don’t let the solution overflow.)
12. Rinse the beaker with 1-3mL of distilled water and pour that water into the filter paper as well. (If there is a little solid left in the beaker, leave it. It is experimental error.)
13. When the liquid has drained, lay the filter paper and precipitate on a plate or paper towels to allow it to dry. (mine took overnight, some people take 3 days)
14. When dry, weigh the precipitate + filter paper, record it, and calculate the mass of the precipitate.
15. In the discussion, calculate the theoretical yield and percent yield.
(4 pts) Data:
Table 1: Data
Mass of CaCl2
Mass of Na2CO3 needed
Actual mass of Na2CO3 used
Observation of reaction
Mass of filter paper
Mass of filter paper + precip
Actual yield of Calcium Carbonate
1. (3 pts) Calculate how much Na2CO3 you need to completely react your mass of CaCl2. (Show that calculation here)
2. (2 pts) Write out the reaction that occurred to form calcium carbonate. Remember to identify the phases and balance the equation.
3. (2 pts) Calculate the actual yield of Calcium Carbonate. (Show your work)
4. (2 pts) Calculate the theoretical yield of Calcium Carbonate. (Show your work)
5. (2 pts) Calculate your percent yield of Calcium Carbonate. (Show your work)
Insert a picture of your filter paper with yield for 2 pts extra credit. ;-)
When you are finished, save the file as LASTNAME_Stoich and upload it to the Dropbox for Unit 4 Labs.
Unit 4 Lab: Ionic ReactionCHEM 1806
Purpose: To observe several ionic reactions and practice net ionic equations
...
Lab 9 Chemical Reactions IIPre-lab Questions1. Michelangelo u.docxsmile790243
Lab 9: Chemical Reactions II
Pre-lab Questions
1. Michelangelo used fresco painting when he painted the Sistine Chapel. Fresco painting involves most of the types of chemical reactions you just studied. Listed below are some of the reactions used in creating a Fresco painting. Identify the type of chemical reaction used for each step and balance the chemical equation if needed.
Initially, some sort of heat must be generated. Propane is an example of a common fuel source used for heating.
C3H8 + O2 → CO2 + H2O
This is a ____________________________________________ reaction.
Next, quicklime (calcium oxide) is made by roasting calcium carbonate (limestone).
CaCO3 → CaO + CO2
This is a ____________________________________________ reaction.
The quicklime is slaked to form lime plaster.
CaO + H2O → Ca(OH)2
This is a ____________________________________________reaction.
The lime plaster is cured or dried.
Ca(OH)2 + CO2 → Ca(OH)(HCO3)
This is a ____________________________________________ reaction.
This quickly continues to react to form calcium carbonate and water.
Ca(OH)(HCO3) → CaCO3 + H2O
This is a ____________________________________________ reaction.
Frescos will deteriorate over time when exposed to the damp, acidic environments typical of modern urban city atmospheres.
CaCO3 + H2SO4 → CaSO4 + H2O + CO2
This is a ____________________________________________ reaction.
2. Balance each of the chemical equa_ons you will be doing in this laboratory exercise.
Combustion:
C4H10 (g) + O2 (g) → CO2 (g) + H2O(g)
Synthesis:
Hb (s) + O2 → HbO2 (s)
Single Replacement:
Zn (s) + H3C6H5O7 (aq) → Zn3(H3C6H5O7)2 (aq) + H2 (g)
Double Replacement:
Zn(C2H3O2)2 (aq) + Na3PO4 (aq) → NaC2H3O2 (aq) + Zn3(PO4)2 (s)
Decomposition:
(NH4)2CO3 (s) → NH3 + H2O + CO2 (g)
Experiment: Getting to Know your Reactions
Procedure
**Take photographs of your experiment set up for Parts 1 - 5 and your results. Submit them with your laboratory report.**
Part 1: Combustion
C4H10 (g) + O2(g) → CO2 (g) + H2O (g)
1. Light a butane lighter and observe the flame. (The ignition of the flame is a reaction between butane and the oxygen in the air you breathe.)
2. Record your observations in the data table from when the lighter is turned on until it is turned off.
Part 2: Synthesis (A + B → C)
Hb(s) + O2 → HbO2 (s)
1. Take a deep breath, hold it as long as possible and then exhale. Visualize the reaction occurring.
2. Record your observations before inhaling and a>er you exhale.
3. Construct an oxyhemoglobin molecule with modeling clay and toothpicks.
Hint: See figure of molecule in introduction as a guide.
4. Take a photograph of your model and submit it with your laboratory report.
Part 3: Single Replacement (A + BC → AC + B)
Zn (s) + H3C6H5O7 (aq) → Zn3(C6H5O7)2 (aq) + H2 (g)
1. Place a test tube in a test tube rack or small beaker.
2. Slightly tilt a test tube and slide a small zinc-coated (galvanized) washer down the side.
3. Use a 10 mL graduated cylinder to measu ...
Stoichiometry Lab – The Chemistry Behind Carbonates reacting with .docxwhitneyleman54422
Stoichiometry Lab – The Chemistry Behind Carbonates reacting with Vinegar
Objectives: To visually observe what a limiting reactant is.
To measure the change in mass during a chemical reaction due to loss of a gas.
To calculate CO2 loss and compare actual loss to expected CO2 loss predicted by the balanced chemical equation.
Materials needed: Note: Plan ahead as you’ll need to let Part 1 sit for at least 24 hours.
plastic beaker graduated cylinder
electronic balance 2 eggs
1 plastic cup baking soda (5 g)
dropper vinegar (500mL)
2 identical cups or glasses (at least 500 mL)
Safety considerations: Safety goggles are highly recommended for this lab as baking soda and vinegar chemicals can be irritating to the eyes. If your skin becomes irritated from contact with these chemicals, rinse with cool water for 15 minutes.
Introduction:
The reaction between baking soda and vinegar is a fun activity for young people. Most children (and adults!) enjoy watching the foamy eruption that occurs upon mixing these two household substances. The reaction has often been used for erupting volcanoes in elementary science classes. The addition of food coloring makes it even more fun. The reaction involves an acid-base reaction that produces a gas (CO2). Acid-base reactions typically involve the transfer of a hydrogen ion (H+) from the acid (HA) to the base (B−):
HA + B− --> A− + BH (eq #1)
acid base
The base often (although not always) carries a negative charge. The acid usually (although not always) becomes negatively charged through the course of the reaction because it lost an H+. An example of a typical acid base reaction is below:
HCl(aq) + NaOH(aq) --> NaCl(aq) + H2O(l) (eq #2)
The reaction is actually taking place between the hydrogen ion (H+) and the hydroxide ion (OH−). The chloride and sodium are spectator ions. To write the reaction in the same form as eq #1:
HCl(aq) + OH- --> Cl- + H2O (l) (eq #3)
Sodium bicarbonate (NaHCO3) will dissociate in water to form sodium ion (Na+) and bicarbonate ion (HCO3−).
NaHCO3 --> Na+ + HCO3− (eq #4)
Vinegar is usually a 5% solution of acetic acid in water. The bicarbonate anion (HCO3−) can act as a base, accepting a hydrogen ion from the acetic acid (HC2H3O2) in the vinegar. The Na+ is just a spectator ion and does nothing.
HCO3− + HC2H3O2 --> H2CO3 + C2H3O2− (eq#5)
Bicarbonate acetic acid carbonic acid acetate ion
The carbonic acid that is formed (H2CO3) decomposes to form water and carbon dioxide:
H2CO3 --> H2O(l) + CO2(g) (eq#6)
carbonic acid water carbon dioxide
The latter reaction (production of carbon dioxide) accounts for the bubbles and the foaming that is observed upon mixing vinegar and baki.
odium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO3. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. It has a slightly salty, alkaline taste resembling that of washing soda (sodium carbonate). The natural mineral form is nahcolite. It is a component of the mineral natron and is found dissolved in many mineral springs. It is among the food additives encoded by European Union, identified by the initials E 500. Since it has long been known and is widely used, the salt has many related names such as baking soda, bread soda, cooking soda, and bicarbonate of soda.
Lab 9 Chemical Reactions IIPre-lab Questions1. What is a limi.docxsmile790243
Lab 9: Chemical Reactions II
Pre-lab Questions
1. What is a limiting reagent?
2. A student used 7.15 g of CaCl2 and 9.25 g of K2CO3 to make CaCO3. The actual yield was 6.15 g of CaCO3. Calculate the limiting reagent and the percent yield.
Experiment: Synthesis of Garden Lime
Procedure
**Take photographs of your experiment set up and your results. Submit them with your laboratory report.**
1. Table 1 provides an example set of data for 1.0 g CaCl2.
2. For Trial 1, weigh into a 250 mL beaker the amount of calcium chloride (CaCl2) shown in Table 1. Record the exact mass you weigh out in the Trial 1 column of the Data section.
3. Measure 50.0 mL of distilled water into a 100 mL graduated cylinder. Pour the water into the 250 mL beaker with the calcium chloride.
4. Stir the solution with a stirring rod until all of the calcium chloride is dissolved.
5. Weigh out 2.5 g of potassium carbonate (K2CO3) in a 50 mL beaker. Record the exact mass in the Data section.
6. Measure 25.0 mL of distilled water into a 100 mL graduated cylinder. Add the water into the 50 mL beaker containing the potassium carbonate.
7. Stir the potassium carbonate in the distilled water with a stirring rod until it is all dissolved.
8. Pour the K2CO3 solution into the 250 mL beaker that has the CaCl2 solution. Rinse the beaker that contained the K2CO3 with a few mL of water and add this to the CaCl2 solution. Stir the mixture.
9. As soon as the reaction begins, record your observations in the Data section. Continue stirring until you see no more precipitate forming.
10. Set up the funnel in the Erlenmeyer flask as shown in Figure 2.
HINT: Do NOT begin filtering yet!
11. Zero the scale and weigh a piece of filter paper and a watch glass. Record the masses of both items in the Data section.
12. Prepare a filtering funnel as shown in Figure 2: fold a piece of filter paper in half twice to make quarters, and open the paper to make a small cone (three quarters are open on one side and one quarter is on the opposite side). Place the paper cone into the funnel and hold it in place with your fingers. Pour a small amount of distilled water through the paper to secure it inside the funnel.
13. Filter the mixture by pouring it into the filter paper in the funnel. Use the stirring rod and distilled water in a wash bottle to transfer the entire solid into the filter paper.
HINT: For best results, be sure to transfer all of the precipitate into the filter paper. Use a rubber policeman if it is available to help with the transfer.
14. Rinse the remaining solid in the filter paper twice with distilled water from a wash bottle to rinse off excess sodium chloride (NaCl). After all the liquid has filtered through, rinse the product with approximately 5 mL of ethanol to aid in its drying. Allow the ethanol to completely finish filtering through the paper.
15. Remove the filter paper carefully so as to not lose any product. Gently unfold the filter paper and lay it flat on the pre-weighed wat ...
Unit 4 Lab StoichiometryCHEM 1806Purpose To practice the conce.docxdickonsondorris
Unit 4 Lab: StoichiometryCHEM 1806
Purpose: To practice the concept of Stoichiometry
Materials: Student Supplied – Distilled water, paper towels, small paper cup, mug
LabPaq materials: 100 mL glass beaker, Funnel, 25 mL cylinder, Goggles, Digital Scale, Weighing boat, 2.5 g Calcium chloride, dehydrate, Filter paper, 2 g Sodium carbonate.
Procedure:
1. While wearing goggles, weigh out 1.0 g CaCl2 and put it into the 100 mL beaker. Record the actual mass of CaCl2 you are using in Table 1.
2. Add 25 mL of distilled water to the beaker and stir. This is now the “Calcium chloride solution”
3. Calculate how much sodium carbonate you will need for a full reaction. Write that calculation in the Results and Discussion section.
4. Weigh out the calculated amount of Na2CO3 and put it in a small paper cup. (Record actual mass in Data Table 1)
5. Add 25 mL distilled water to the paper cup and stir to make “sodium carbonate solution.”
6. Pour the sodium carbonate solution into the beaker with the calcium chloride solution.
7. Record observations. Write out the reaction of what occurred in the results section. (The solid is calcium carbonate.)
8. Fold the filter paper in half, then in quarters. Record the mass of the filter paper.
9. Place the filter paper in the funnel and open one side.
10. Place the funnel in a mug or other cup to balance it.
11. Carefully swirl and pour the contents of the beaker into the filter paper. (Don’t let the solution overflow.)
12. Rinse the beaker with 1-3mL of distilled water and pour that water into the filter paper as well. (If there is a little solid left in the beaker, leave it. It is experimental error.)
13. When the liquid has drained, lay the filter paper and precipitate on a plate or paper towels to allow it to dry. (mine took overnight, some people take 3 days)
14. When dry, weigh the precipitate + filter paper, record it, and calculate the mass of the precipitate.
15. In the discussion, calculate the theoretical yield and percent yield.
(4 pts) Data:
Table 1: Data
Mass of CaCl2
Mass of Na2CO3 needed
Actual mass of Na2CO3 used
Observation of reaction
Mass of filter paper
Mass of filter paper + precip
Actual yield of Calcium Carbonate
1. (3 pts) Calculate how much Na2CO3 you need to completely react your mass of CaCl2. (Show that calculation here)
2. (2 pts) Write out the reaction that occurred to form calcium carbonate. Remember to identify the phases and balance the equation.
3. (2 pts) Calculate the actual yield of Calcium Carbonate. (Show your work)
4. (2 pts) Calculate the theoretical yield of Calcium Carbonate. (Show your work)
5. (2 pts) Calculate your percent yield of Calcium Carbonate. (Show your work)
Insert a picture of your filter paper with yield for 2 pts extra credit. ;-)
When you are finished, save the file as LASTNAME_Stoich and upload it to the Dropbox for Unit 4 Labs.
Unit 4 Lab: Ionic ReactionCHEM 1806
Purpose: To observe several ionic reactions and practice net ionic equations
...
Lab 9 Chemical Reactions IIPre-lab Questions1. Michelangelo u.docxsmile790243
Lab 9: Chemical Reactions II
Pre-lab Questions
1. Michelangelo used fresco painting when he painted the Sistine Chapel. Fresco painting involves most of the types of chemical reactions you just studied. Listed below are some of the reactions used in creating a Fresco painting. Identify the type of chemical reaction used for each step and balance the chemical equation if needed.
Initially, some sort of heat must be generated. Propane is an example of a common fuel source used for heating.
C3H8 + O2 → CO2 + H2O
This is a ____________________________________________ reaction.
Next, quicklime (calcium oxide) is made by roasting calcium carbonate (limestone).
CaCO3 → CaO + CO2
This is a ____________________________________________ reaction.
The quicklime is slaked to form lime plaster.
CaO + H2O → Ca(OH)2
This is a ____________________________________________reaction.
The lime plaster is cured or dried.
Ca(OH)2 + CO2 → Ca(OH)(HCO3)
This is a ____________________________________________ reaction.
This quickly continues to react to form calcium carbonate and water.
Ca(OH)(HCO3) → CaCO3 + H2O
This is a ____________________________________________ reaction.
Frescos will deteriorate over time when exposed to the damp, acidic environments typical of modern urban city atmospheres.
CaCO3 + H2SO4 → CaSO4 + H2O + CO2
This is a ____________________________________________ reaction.
2. Balance each of the chemical equa_ons you will be doing in this laboratory exercise.
Combustion:
C4H10 (g) + O2 (g) → CO2 (g) + H2O(g)
Synthesis:
Hb (s) + O2 → HbO2 (s)
Single Replacement:
Zn (s) + H3C6H5O7 (aq) → Zn3(H3C6H5O7)2 (aq) + H2 (g)
Double Replacement:
Zn(C2H3O2)2 (aq) + Na3PO4 (aq) → NaC2H3O2 (aq) + Zn3(PO4)2 (s)
Decomposition:
(NH4)2CO3 (s) → NH3 + H2O + CO2 (g)
Experiment: Getting to Know your Reactions
Procedure
**Take photographs of your experiment set up for Parts 1 - 5 and your results. Submit them with your laboratory report.**
Part 1: Combustion
C4H10 (g) + O2(g) → CO2 (g) + H2O (g)
1. Light a butane lighter and observe the flame. (The ignition of the flame is a reaction between butane and the oxygen in the air you breathe.)
2. Record your observations in the data table from when the lighter is turned on until it is turned off.
Part 2: Synthesis (A + B → C)
Hb(s) + O2 → HbO2 (s)
1. Take a deep breath, hold it as long as possible and then exhale. Visualize the reaction occurring.
2. Record your observations before inhaling and a>er you exhale.
3. Construct an oxyhemoglobin molecule with modeling clay and toothpicks.
Hint: See figure of molecule in introduction as a guide.
4. Take a photograph of your model and submit it with your laboratory report.
Part 3: Single Replacement (A + BC → AC + B)
Zn (s) + H3C6H5O7 (aq) → Zn3(C6H5O7)2 (aq) + H2 (g)
1. Place a test tube in a test tube rack or small beaker.
2. Slightly tilt a test tube and slide a small zinc-coated (galvanized) washer down the side.
3. Use a 10 mL graduated cylinder to measu ...
Stoichiometry Lab – The Chemistry Behind Carbonates reacting with .docxwhitneyleman54422
Stoichiometry Lab – The Chemistry Behind Carbonates reacting with Vinegar
Objectives: To visually observe what a limiting reactant is.
To measure the change in mass during a chemical reaction due to loss of a gas.
To calculate CO2 loss and compare actual loss to expected CO2 loss predicted by the balanced chemical equation.
Materials needed: Note: Plan ahead as you’ll need to let Part 1 sit for at least 24 hours.
plastic beaker graduated cylinder
electronic balance 2 eggs
1 plastic cup baking soda (5 g)
dropper vinegar (500mL)
2 identical cups or glasses (at least 500 mL)
Safety considerations: Safety goggles are highly recommended for this lab as baking soda and vinegar chemicals can be irritating to the eyes. If your skin becomes irritated from contact with these chemicals, rinse with cool water for 15 minutes.
Introduction:
The reaction between baking soda and vinegar is a fun activity for young people. Most children (and adults!) enjoy watching the foamy eruption that occurs upon mixing these two household substances. The reaction has often been used for erupting volcanoes in elementary science classes. The addition of food coloring makes it even more fun. The reaction involves an acid-base reaction that produces a gas (CO2). Acid-base reactions typically involve the transfer of a hydrogen ion (H+) from the acid (HA) to the base (B−):
HA + B− --> A− + BH (eq #1)
acid base
The base often (although not always) carries a negative charge. The acid usually (although not always) becomes negatively charged through the course of the reaction because it lost an H+. An example of a typical acid base reaction is below:
HCl(aq) + NaOH(aq) --> NaCl(aq) + H2O(l) (eq #2)
The reaction is actually taking place between the hydrogen ion (H+) and the hydroxide ion (OH−). The chloride and sodium are spectator ions. To write the reaction in the same form as eq #1:
HCl(aq) + OH- --> Cl- + H2O (l) (eq #3)
Sodium bicarbonate (NaHCO3) will dissociate in water to form sodium ion (Na+) and bicarbonate ion (HCO3−).
NaHCO3 --> Na+ + HCO3− (eq #4)
Vinegar is usually a 5% solution of acetic acid in water. The bicarbonate anion (HCO3−) can act as a base, accepting a hydrogen ion from the acetic acid (HC2H3O2) in the vinegar. The Na+ is just a spectator ion and does nothing.
HCO3− + HC2H3O2 --> H2CO3 + C2H3O2− (eq#5)
Bicarbonate acetic acid carbonic acid acetate ion
The carbonic acid that is formed (H2CO3) decomposes to form water and carbon dioxide:
H2CO3 --> H2O(l) + CO2(g) (eq#6)
carbonic acid water carbon dioxide
The latter reaction (production of carbon dioxide) accounts for the bubbles and the foaming that is observed upon mixing vinegar and baki.
odium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO3. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. It has a slightly salty, alkaline taste resembling that of washing soda (sodium carbonate). The natural mineral form is nahcolite. It is a component of the mineral natron and is found dissolved in many mineral springs. It is among the food additives encoded by European Union, identified by the initials E 500. Since it has long been known and is widely used, the salt has many related names such as baking soda, bread soda, cooking soda, and bicarbonate of soda.
Chemistry 201 Laboratory- Harold Washington College ReacJinElias52
Chemistry 201 Laboratory- Harold Washington College
Reactions of Copper and Percent Recovery
Introduction
In Chapter 4 of your textbook, we have covered the 3 main classes of reactions in aqueous
solution: precipitation reactions, acid-base reactions, and oxidation-reduction reactions. These
can be summarized as follows:
• In Precipitation reactions: a solid product forms from aqueous reactants. The product can
be predicted by using solubility rules.
• In Acid-base neutralization reactions: an acid (proton donor) reacts with a base (proton
acceptor) to form an ionic salt and sometimes water. You can recognize this type of
reaction by the presence of an acid and base in the reactants.
• In Oxidation-reduction reactions (or redox for short): electrons are transferred between
reactants. So you will always see changes in oxidation number within this type of
reaction.
In this lab, we will be examining these reactions by carrying out a sequence of reactions
starting from metallic copper in the form of a wire. According to the Law of Mass Conservation,
covered in section 2.3 of your textbook, mass is neither created nor destroyed. So since no
copper is added or removed during the course of these reactions, you should be able to
quantitatively recover all of the copper metal you started with at the end of these reactions (if
everything goes well).
You need to carefully observe and record your observations. You should be able to
carefully describe the reactions in terms of color change (color of solution or solid forming), gas
formation (as bubbles), heat generation (change in temperature), or precipitate formation,
throughout the experiment.
At the end of the reactions series, you will collect the copper recovered and calculate the
percent recovery (% yield) of copper using this formula:
% yield = actual amount of Cu recovered x 100 %
original amount of Cu
Materials and Equipment
• Piece of copper wire (about 0.5 g)
• concentrated HNO3 (aq)
• 3.0M NaOH
• 6.0M H2SO4
• solid zinc
• 2-250 mL beakers, 400 mL beaker
• 50 mL graduated cylinder
• boiling chips
• stirring rod
• iron ring and ring stand, wire gauze,
• Bunsen burner
• evaporating dish
• electronic balance
Chemistry 201 Laboratory- Harold Washington College
SAFETY NOTES
• Safety goggles should be worn at all times
• Sulfuric acid, nitric acid, and sodium hydroxide are corrosive chemicals and should be
handled with care.
• Gloves are to be worn when handling these chemicals.
• Waste should be put in the designated container in the hood. Never throw chemicals
down the drain.
PROCEDURE
1. Obtain a piece copper wire, measure its mass to the nearest 0.01 g, and place it in a 400
mL beaker.
2. IN THE HOOD, add 4-5 mL of concentrated nitric acid, HNO3, to the beaker. (Caution:
Be careful not to get any of the nitric acid on yourself. If you do, wash it o ...
Chem 162 Lab 3: Gas Laws Part I & II- Sample Data for the class
1) Sample Data Group 1:
Part I
Part II
Volume (ml)
Pressure (kPa)
Temperature (°C)
Pressure (kPa)
103.0
60
70.8
113.5
88.0
70
66.3
112.6
73.0
85
61.8
111.5
62.0
100
57.1
110.4
44.0
140
51.5
109.0
34.0
180
39.9
105.5
31.0
200
26.4
101.8
10.5
96.7
2) Sample Data Group 2:
Part I
Part II
Volume (ml)
Pressure (Torr)
Temperature (°C)
Pressure (kPa)
32.0
630
57
109.6
29.2
690
52
108.4
27.8
726
48.5
107.4
25.6
790
43.6
106.3
24.2
843
38.1
104.8
22.2
914
33.1
103.5
29.3
102.2
25.4
101.1
22.5
100.1
20
99.4
17.4
98.6
12.8
97.2
9.4
96.7
Bellevue College | Chemistry 162
1
Empirical Gas Laws (Part 3): The Ideal Gas Law
Determination of the Universal Gas Constant, R
In this experiment, you will generate and collect a sample of hydrogen gas over water by the
reaction of magnesium with hydrochloric acid.
Using the Ideal Gas Law (PV=nRT) you will find values for the pressure (P), volume (V),
number of moles of the gas (n), and the temperature (T) in order to determine the gas constant
(R). Because there will be water vapor present in your sample, you will make a correction to the
measured pressure and then compare your result for R to the literature value.
In this experiment, you will:
Determine a value for the Universal Gas Constant, R. (Part 3 of Empirical Gas Laws)
Safety Precautions
Wear your goggles at all times. Hydrochloric acid is corrosive.
Avoid spills and contact with your skin and clothing. If HCl
comes in contact with your skin, inform your teacher and flush
the acid with large quantities of water.
Note: If you are doing Part 3 to determine the value of the Universal
Gas Constant, R in the same period as Parts 1 and 2, you should get Part 3
started first.
EXPERIMENTAL PROCEDURE (WORK IN PAIRS)
1. Put on goggles. Keep them on during the entire experiment.
2. Obtain a piece of magnesium ribbon that weighs no more than 0.08 grams. Record the mass
obtained (use significant figures!). Record this value in your data table (see report sheets).
Loosely roll it into a ball or coil it.
Encase the magnesium in a piece of copper mesh. Why do you think this might be helpful?
3. Fill the 800-mL beaker with approximately 200-mL of tap water.
4. Fill the 100-mL graduated cylinder with tap water. Using parafilm, a one-
hole stopper, or the palm of your hand, cover the top and invert the cylinder
into the beaker of water. You will end up with an inverted cylinder full of
water. Remove the parafilm or stopper if you used one. Rest the cylinder
on the bottom of the beaker. Try not to introduce any air bubbles in your
inverted cylinder (see Figure 1).
5. Place the magnesium (in its copper cage) into the graduated cylinder. Make
sure the magnesium is captured in the cylinder.
Figure 1: Gas collection in an
inverted cylinder full of water.
Classic, mini chemistry experiments- some require materials typically found in a high school chemistry lab, while others are extremely simple. Very straightforward!
Classic, mini chemistry experiments- some require materials typically found in a high school chemistry lab, while others are extremely simple. Very straightforward!
you will evaluate the history of cryptography from its origins. Ana.docxmattjtoni51554
you will evaluate the history of cryptography from its origins. Analyze how cryptography was used and describe how it grew within history. Look at reasons why cryptography was used and how it developed over the years. Was it used or implemented differently in varying cultures?
need it in two pages.
No plagarism
.
You will do this project in a group of 5 or less. Each group or in.docxmattjtoni51554
You will do this project in a group of 5 or less. Each group or individual will sign up to present on a public health issue and intervention of their choice. They will provide background information on the public health issue and explain why it is relevant and/or prevalent. They will also determine if some of the factors discussed throughout the course (i.e. urbanization, vulnerable populations, health disparities, social determinants of health, public health ethics, health literacy, etc.) were major factors in the development and implementation of the intervention that they choose to highlight. The groups or individuals will prepare a presentation of their information as well as a paper to depict their findings. The presentation can be in any form including, but not limited to, a PowerPoint presentation, a Prezi, a website, a video recording, etc.
My assigned part.
vulnerable populations Morolake
health disparities Morolake
social determinants of health, public health ethics Morolake
PPT
THE IMPLEMENTATION PLAN THAT WAS USED TO FORMULATE THE COMMUNICATION CAMPAIGN
3 slides excluding the references
.
More Related Content
Similar to phychem1phychem2Lab 9 Chemical Reactions IIPre-lab Qu.docx
Chemistry 201 Laboratory- Harold Washington College ReacJinElias52
Chemistry 201 Laboratory- Harold Washington College
Reactions of Copper and Percent Recovery
Introduction
In Chapter 4 of your textbook, we have covered the 3 main classes of reactions in aqueous
solution: precipitation reactions, acid-base reactions, and oxidation-reduction reactions. These
can be summarized as follows:
• In Precipitation reactions: a solid product forms from aqueous reactants. The product can
be predicted by using solubility rules.
• In Acid-base neutralization reactions: an acid (proton donor) reacts with a base (proton
acceptor) to form an ionic salt and sometimes water. You can recognize this type of
reaction by the presence of an acid and base in the reactants.
• In Oxidation-reduction reactions (or redox for short): electrons are transferred between
reactants. So you will always see changes in oxidation number within this type of
reaction.
In this lab, we will be examining these reactions by carrying out a sequence of reactions
starting from metallic copper in the form of a wire. According to the Law of Mass Conservation,
covered in section 2.3 of your textbook, mass is neither created nor destroyed. So since no
copper is added or removed during the course of these reactions, you should be able to
quantitatively recover all of the copper metal you started with at the end of these reactions (if
everything goes well).
You need to carefully observe and record your observations. You should be able to
carefully describe the reactions in terms of color change (color of solution or solid forming), gas
formation (as bubbles), heat generation (change in temperature), or precipitate formation,
throughout the experiment.
At the end of the reactions series, you will collect the copper recovered and calculate the
percent recovery (% yield) of copper using this formula:
% yield = actual amount of Cu recovered x 100 %
original amount of Cu
Materials and Equipment
• Piece of copper wire (about 0.5 g)
• concentrated HNO3 (aq)
• 3.0M NaOH
• 6.0M H2SO4
• solid zinc
• 2-250 mL beakers, 400 mL beaker
• 50 mL graduated cylinder
• boiling chips
• stirring rod
• iron ring and ring stand, wire gauze,
• Bunsen burner
• evaporating dish
• electronic balance
Chemistry 201 Laboratory- Harold Washington College
SAFETY NOTES
• Safety goggles should be worn at all times
• Sulfuric acid, nitric acid, and sodium hydroxide are corrosive chemicals and should be
handled with care.
• Gloves are to be worn when handling these chemicals.
• Waste should be put in the designated container in the hood. Never throw chemicals
down the drain.
PROCEDURE
1. Obtain a piece copper wire, measure its mass to the nearest 0.01 g, and place it in a 400
mL beaker.
2. IN THE HOOD, add 4-5 mL of concentrated nitric acid, HNO3, to the beaker. (Caution:
Be careful not to get any of the nitric acid on yourself. If you do, wash it o ...
Chem 162 Lab 3: Gas Laws Part I & II- Sample Data for the class
1) Sample Data Group 1:
Part I
Part II
Volume (ml)
Pressure (kPa)
Temperature (°C)
Pressure (kPa)
103.0
60
70.8
113.5
88.0
70
66.3
112.6
73.0
85
61.8
111.5
62.0
100
57.1
110.4
44.0
140
51.5
109.0
34.0
180
39.9
105.5
31.0
200
26.4
101.8
10.5
96.7
2) Sample Data Group 2:
Part I
Part II
Volume (ml)
Pressure (Torr)
Temperature (°C)
Pressure (kPa)
32.0
630
57
109.6
29.2
690
52
108.4
27.8
726
48.5
107.4
25.6
790
43.6
106.3
24.2
843
38.1
104.8
22.2
914
33.1
103.5
29.3
102.2
25.4
101.1
22.5
100.1
20
99.4
17.4
98.6
12.8
97.2
9.4
96.7
Bellevue College | Chemistry 162
1
Empirical Gas Laws (Part 3): The Ideal Gas Law
Determination of the Universal Gas Constant, R
In this experiment, you will generate and collect a sample of hydrogen gas over water by the
reaction of magnesium with hydrochloric acid.
Using the Ideal Gas Law (PV=nRT) you will find values for the pressure (P), volume (V),
number of moles of the gas (n), and the temperature (T) in order to determine the gas constant
(R). Because there will be water vapor present in your sample, you will make a correction to the
measured pressure and then compare your result for R to the literature value.
In this experiment, you will:
Determine a value for the Universal Gas Constant, R. (Part 3 of Empirical Gas Laws)
Safety Precautions
Wear your goggles at all times. Hydrochloric acid is corrosive.
Avoid spills and contact with your skin and clothing. If HCl
comes in contact with your skin, inform your teacher and flush
the acid with large quantities of water.
Note: If you are doing Part 3 to determine the value of the Universal
Gas Constant, R in the same period as Parts 1 and 2, you should get Part 3
started first.
EXPERIMENTAL PROCEDURE (WORK IN PAIRS)
1. Put on goggles. Keep them on during the entire experiment.
2. Obtain a piece of magnesium ribbon that weighs no more than 0.08 grams. Record the mass
obtained (use significant figures!). Record this value in your data table (see report sheets).
Loosely roll it into a ball or coil it.
Encase the magnesium in a piece of copper mesh. Why do you think this might be helpful?
3. Fill the 800-mL beaker with approximately 200-mL of tap water.
4. Fill the 100-mL graduated cylinder with tap water. Using parafilm, a one-
hole stopper, or the palm of your hand, cover the top and invert the cylinder
into the beaker of water. You will end up with an inverted cylinder full of
water. Remove the parafilm or stopper if you used one. Rest the cylinder
on the bottom of the beaker. Try not to introduce any air bubbles in your
inverted cylinder (see Figure 1).
5. Place the magnesium (in its copper cage) into the graduated cylinder. Make
sure the magnesium is captured in the cylinder.
Figure 1: Gas collection in an
inverted cylinder full of water.
Classic, mini chemistry experiments- some require materials typically found in a high school chemistry lab, while others are extremely simple. Very straightforward!
Classic, mini chemistry experiments- some require materials typically found in a high school chemistry lab, while others are extremely simple. Very straightforward!
you will evaluate the history of cryptography from its origins. Ana.docxmattjtoni51554
you will evaluate the history of cryptography from its origins. Analyze how cryptography was used and describe how it grew within history. Look at reasons why cryptography was used and how it developed over the years. Was it used or implemented differently in varying cultures?
need it in two pages.
No plagarism
.
You will do this project in a group of 5 or less. Each group or in.docxmattjtoni51554
You will do this project in a group of 5 or less. Each group or individual will sign up to present on a public health issue and intervention of their choice. They will provide background information on the public health issue and explain why it is relevant and/or prevalent. They will also determine if some of the factors discussed throughout the course (i.e. urbanization, vulnerable populations, health disparities, social determinants of health, public health ethics, health literacy, etc.) were major factors in the development and implementation of the intervention that they choose to highlight. The groups or individuals will prepare a presentation of their information as well as a paper to depict their findings. The presentation can be in any form including, but not limited to, a PowerPoint presentation, a Prezi, a website, a video recording, etc.
My assigned part.
vulnerable populations Morolake
health disparities Morolake
social determinants of health, public health ethics Morolake
PPT
THE IMPLEMENTATION PLAN THAT WAS USED TO FORMULATE THE COMMUNICATION CAMPAIGN
3 slides excluding the references
.
you will discuss the use of a tool for manual examination of a .docxmattjtoni51554
you will discuss the use of a tool for manual examination of a phone:
Example tools used
Hardware tools
1.Project-A-Phone
2. Fernico ZRT
3. Eclipse Screen Capture Tool
4.Cellebrite USB camera
Software solution tools
1. ScreenHunter
2. Snagit
Select one of the tools mentioned in the text and describe the tools functionality and process used in an examination of a device.
Using the Internet, research the web for an article related to the tool and answer the following questions:
What are some of the advantages or disadvantages of the tool?
Discuss the tools setup
Appraise the value of the tool in gathering evidence for the prosecution
.
you will discuss sexuality, popular culture and the media. What is .docxmattjtoni51554
you will discuss sexuality, popular culture and the media. What is social and sexual norms? What would you consider the ideal sexual behavior and pattern with regards to sexuality and society? Be sure to use your textbook as a reference and submit your initial posting with citations and references at a minimum of 200 words by Thursday.
.
You will discuss assigned questions for the ModuleWeek. · Answe.docxmattjtoni51554
You will discuss assigned questions for the Module/Week.
· Answers to questions must be supported with research and citations. It is not unusual, for instance, to have 3–4 citations per paragraph in doctoral-level research.
· Remember also that writing a research paper, especially at the doctoral-level, requires you to weave in ideas from numerous sources and then in turn synthesizing those ideas to create fresh insights and knowledge.
Specifics:
· 10-12 pages of content, double-spaced
· Must include citations from all readings and presentations for the assigned module (including the Fischer presentations and readings) and at least 15 scholarly sources
· Must include Biblical integration (the Fischer sources will help to that end)
· Current APA format
Module/Week 5 Essay
Discuss the following:
· Define governance.
· What are some of the connotations of the term governance as well?
· What is meant by “good” governance?
· Provide a Biblical perspective on governance in the public administration context.
Essay Paper Grading Rubric
Criteria
Levels of Achievement
Content
(70%)
Advanced
94-100%
Proficient
88-93%
Developing
1-87%
Not present
Total
Content
42.5 to 45 points
:
· Thoroughly answers each assigned question.
· Provides a well-reasoned synthesis of key ideas.
39.5 to 42 points
:
· Answers each assigned question.
· Provides some synthesis of key ideas.
1 to 39 points
:
· Fails to answer one or more questions.
· Largely fails to provide a meaningful synthesis of key ideas.
0 points
Not present
Research & Support
42.5 to 45 points
:
· Goes beyond required reading to provide an in-depth, researched discussion of the assigned questions.
· Supports assertions with research and numerous citations from all required reading, presentations, and scholarly source material.
39.5 to 42 points
:
· For the most part, goes beyond required reading to provide a discussion of the assigned questions.
· For the most part, supports assertions with research and citations.
1 to 39 points
:
· Largely fails to go beyond the required reading to answer questions.
· Limited use of research and citations to support assertions.
0 points
Not present
Biblical Integration
30.5 to 32.5 points
:
Provides a nuanced discussion of Biblical concepts as related to the content and assigned questions.
28.5 to 30 points
:
For the most part, provides a discussion of Biblical concepts as related to the content and assigned questions.
1 to 28 points
:
Provides only a limited discussion of Biblical concepts as related to the content and assigned questions.
0 points
Not present
Structure (30%)
Advanced
94-100%
Proficient
88-93%
Developing
1-87%
Not present
Total
Sources & Citations
19 to 20 points:
· All required readings and presentations from the current and prior modules must be cited.
· At least 15 scholarly sources are used.
17.5 to 18.5 points:
· Most of the required readings and present.
You will develop a proposed public health nursing intervention to me.docxmattjtoni51554
You will develop a proposed public health nursing intervention to meet an identified need and/ or gap in your own community. This must be within the scope of the staff level public health/ community health nurse. (Note: you cannot propose building facilities or purchasing a mobile health van). The intervention should demonstrate your application of previous learning in the program related to process improvement and evidence based nursing practice. Quality peer reviewed references are required to support the need as well as the structure, elements, and evaluation of the intervention.Focus on your own local community. You will use resources found in CANVAS, FSW library, and the web to develop this project. Note that census and other epidemiological data is not available down to zip codes or census tracts in Florida- only by county and/ or city & state.
Community Data Collection Survey – THIS IS THE FIRST STEP IN TO COMPLETE YOUR FINAL PAPER. Community Data Collection Survey
Collect relevant data about your community covering the required areas in the survey tool. References are required to support the data. The final part of the Survey is your summary of the identified gap/ need that will be the focus of a targeted public health nursing intervention in your Community Assessment Project. The Data Assessment Form is in Course Resources in Modules. The form is a tool to assist you collect your data and information.
This is a scholarly paper with appropriate use of tables (see APA Manual for how to format and label tables).
Utilize the resources and web sites located in Course Resources in Canvas. In addition, Community Health Assessments are usually published by your county and/ city with relevant information. The data is usually based on county and/ city information. You can also look at Robert Wood Johnson Foundation information on public health issues that may be applicable to your area. Many resources are provided in Course Resources as a starting point for your data collection. DO NOT Submit the tool... this is a paper.
NUR 4636C Community Health Nursing Assessment Tool v2-1.docx
PAPER CONTENT:
Community Being Assessed
Vital Statistics
Births
Deaths
Causes of mortality and morbidity
Leading infectious diseases
Number of healthy days
3. Social Determinants of Health
Access to health care
Housing
Employment
Environment -Water and Air quality, pollution
Safety- police, fire
Education systems
Recreation
Government role in health access/ provision
Issue/ need identified.
includes at least 5 references from current peer-reviewed nursing journals and /or textbook or reliable education, government or organizational website.
This is for the Lee county area.
.
You will develop a comprehensive literature search strategy. After r.docxmattjtoni51554
You will develop a comprehensive literature search strategy. After reviewing Chapter 5 in
How To Do A Systematic Literature Review In Nursing: A Step-By-Step Guide
(Bettany-Saltikov, 2012), address the following:
Identify each step involved in the comprehensive literature search strategy
Outline each step as it applies to your capstone
Next, you will locate two existing scholarly articles that are Attached and show evidence of (1) properly paraphrasing and citing the abstract, and (2) directly quoting two sentences from the abstract
(with proper attribution). Be sure to include a reference list that corresponds with your general citation and direct quote citation. You do
not
need a title page.
Please keep in mind that I am looking for evidence of understanding the difference between properly
paraphrasing conten
t and a
direct quote
. Both require its respective in-text citation.
In two diferent paragraph give your personal opinion to Jordan Paltani and Felita Daniel-sacagiu
Jordan Paltani
Write What is Right
Each step involved in the comprehensive literature search strategy include evaluating references to help find ideas of sources to use, searching by hand to avoid bias, reading “grey” conference proceedings and/or PhD theses, and contacting authors to get access to unpublished literature.
Each step as it applies to my capstone would be first looking at references from the online article
Study: the kidney shortage kills more than 40,000 people a year
, searching in library books starting with organ donation and leading to the shortage of organs, finding doctors who specialize in kidney transplant and see what their PhD thesis was based up, and contacting Dr. Pasavento who wrote the article
Facing Organ Donor Shortage, Patients Forced to Get Creative
.
The article
The Organ Shortage Crisis in America : Incentives, Civic Duty, and Closing the Gap
discusses how the cadaveric kidney donors are becoming insufficient to meet the needs of those in need of a transplant. The author states
“Nearly 120,000 people are in need of healthy organs in the United States (Flescher, 2018).”
It explains how they are trying to increase living donors to donate to those in need either related or unrelated (Flescher, 2018). The author states,
“Every ten minutes a new name is added to the list, while on average twenty people die each day waiting for an organ to become available.”
With that being said, some ideas include paying those for their kidneys or having them just spend a day at dialysis with a patient.
The article
Relieving the kidney donor shortage
, discusses how kidney transplantation is the only treatment for kidney failure. Having a kidney transplant is cheaper than dialysis, which is only a Band-Aid for kidney failure. Financial incentives are currently an idea to have the amount of living donors increase. This can be beneficial for both the donor and the recipient. The autho.
You will develop a formal information paper that addresses the l.docxmattjtoni51554
You will develop a formal information paper that addresses the legal basis of current Department of Homeland Security jurisdiction, mission, and responsibilities. You will need to specifically analyze hazards, to include manmade or technological and naturally occurring hazards, and terrorism, domestic and foreign, in the information paper.
You are an action officer in your local jurisdiction's Office of Homeland Security. This is a recently created office. As a medium-size jurisdiction, the city manager's office has dual responsibilities in many of the leadership and management positions. This is often referred to as being dual-hatted. The chief of police has been assigned as the director of the Office of Homeland Security for the city. She has no prior experience or knowledge of the requirements involved in homeland security and has asked you to provide a formal report on the topic. The chief intends to share this report with other office managers, city department heads, the city manager, and the elected officials of the city (mayor and city council).
Your report is an information paper and should be formatted as such. The report should address the following items:
The legal basis of current Department of Homeland Security jurisdiction, mission, and responsibilities
Legal definitions of hazards, to include manmade or technological and naturally occurring hazards
Legal definitions of terrorism, domestic and foreign
Review of state law and statutes (using your home or residency state) as it applies to hazards
Review of state law and statutes (using your home or residency state) as it applies to terrorism
Summarize your top 5 key points
Provide any recommendations that you may have to your city's leadership concerning homeland security issues
Reference all source material and citations using APA 6th edition
.
You will design a patient education tool that can be used by nurses .docxmattjtoni51554
You will design a patient education tool that can be used by nurses for teaching patients
using computer applications
. You will then present your tool to the class and explain the purpose, how you created it, reasoning for your choice of applications, and provide current evidence of the effectiveness of this patient education. This presentation is 5-10 minutes.
Assignment File(s)
Patient Education Project and Presentation
[Word Document]
Rubric
NM 208 Patient Education Project Tool
NM 208 Patient Education Project ToolCriteriaRatingsPtsThis criterion is linked to a Learning OutcomeUse of Computer Applications
20.0
to >17.0
ptsHigh ProficiencyCreative, innovative, effective use of computer applications17.0
to >14.0
ptsModerately High ProficiencyEffective use of computer applications14.0
to >10.0
ptsProficient PointsIneffective use of computer use of applications10.0
to >0
ptsLow-Level Proficiency/Non-ProficientLacking use of computer applications
20.0 pts
This criterion is linked to a Learning OutcomeOrganization
20.0
to >17.0
ptsHigh ProficiencyExtremely well organized; logical format that was easy to follow; flowed smoothly from one idea to another and cleverly conveyed; the organization enhanced the effectiveness of the project17.0
to >14.0
ptsModerately High ProficiencyWell organized; logical format that was easy to follow; flowed smoothly from one idea to another and conveyed; the organization enhanced the effectiveness of the project14.0
to >10.0
ptsProficient PointsSomewhat organized; ideas were not presented coherently and transitions were not always smooth, which at times distracted the audience10.0
to >0
ptsLow-Level Proficiency/Non-ProficientChoppy and confusing; format was difficult to follow transitions of ideas were abrupt and seriously distracted the audience
20.0 pts
This criterion is linked to a Learning OutcomeContent Accuracy
20.0
to >17.0
ptsHigh Proficiency100 % of the facts are accurate17.0
to >14.0
ptsModerately High Proficiency99-90% of the facts are accurate14.0
to >10.0
ptsProficient Points89-80% of the facts are accurate10.0
to >0
ptsLow-Level Proficiency/Non-ProficientFewer than 80% of facts are accurate
20.0 pts
This criterion is linked to a Learning OutcomeResearch
20.0
to >17.0
ptsHigh ProficiencyWent above and beyond to research information; solicited material in addition to what was provided; brought in personal ideas and information to enhance project; and utilized variety of resources to make project effective17.0
to >14.0
ptsModerately High ProficiencyDid a very good job of researching; utilized materials provided to their full potential; solicited adequate resources to enhance project; at time took the initiative to find information outside of school.14.0
to >10.0
ptsProficient PointsUsed the material provided in an acceptable manner, but did not consult any additional resources10.0
to >0
ptsLow-Level Proficiency/Non-ProficientDid not utilize resources effectively.
You will design a patient education tool that can be used by nur.docxmattjtoni51554
You will design a patient education tool that can be used by nurses for teaching patients
using computer applications.
You will then present your tool to the class and explain the purpose, how you created it, reasoning for your choice of applications, and provide current evidence of the effectiveness of this patient education. This presentation is 5-10 minutes.
DUE DATE:
Total Points: 200
Patient Education Project Tool Rubric - 100 points
Points
18-20
14-17
10-16
0
Comments
Use of Computer Applications
Creative, innovative, effective use of computer applications
Effective use of computer applications
Ineffective use of computer use of applications
Lacking use of computer applications
Organization
Extremely well organized; logical format that was easy to follow; flowed smoothly from one idea to another and cleverly conveyed; the organization enhanced the effectiveness of the project
Well organized; logical format that was easy to follow; flowed smoothly from one idea to another and conveyed; the organization enhanced the effectiveness of the project
Somewhat organized; ideas were not presented coherently and transitions were not always smooth, which at times distracted the audience
Choppy and confusing; format was difficult to follow transitions of ideas were abrupt and seriously distracted the audience
Content Accuracy
100 % of the facts are accurate
99-90% of the facts are accurate
89-80% of the facts are accurate
Fewer than 80% of facts are accurate
Research
Went above and beyond to research information; solicited material in addition to what was provided; brought in personal ideas and information to enhance project; and utilized variety of resources to make project effective
Did a very good job of researching; utilized materials provided to their full potential; solicited adequate resources to enhance project; at time took the initiative to find information outside of school.
Used the material provided in an acceptable manner, but did not consult any additional resources
Did not utilize resources effectively; did little or no fact gathering on the topic
Creativity
Was extremely clever and presented with originality; a unique approach that truly enhanced the project
Was clever at times; thoughtfully and uniquely presented
Added a few original touches to enhance the project but did not incorporate them throughout
Little creative energy used during this project; was bland, predictable, and lacked “zip”
Patient Education Project Class Presentation Rubric: 100 points
Points
18-20
14-17
10-13
5-9
0-4
Comments
Voice
Speaker uses appropriate pitch, volume, and rate of speaking. Articulation excellent.
Hasty conversational style; does not interfere with volume or articulation. Communication is unhampered.
Low volume; hasty conversational style compromises artic.
You will create an entire Transformational Change Management Plan fo.docxmattjtoni51554
You will create an entire Transformational Change Management Plan for a medium-sized public company that has lost business to a competitor that has chosen to outsource much of its production operations. The company has been based in a small Midwestern town, it is one of the largest employers, and it has an excellent reputation for employee welfare. It is now planning to do the very same offshoring, which will involve large layoffs of long-term employees.
week 4: Communication Plan (100–150 words)
Include the following context in the communication plan:
What stakeholders require communication?
What will be communicated to them?
Who will send the communication?
What communication medium will be used?
.
You will create an Access School Management System Database that can.docxmattjtoni51554
You will create an Access School Management System Database that can be used to store, retrieve update and delete the staff/student.
Design an Access database to maintain information about school staff and students satisfying the following properties:
1. The staff should have the following: ID#, name, and classes they are teaching
2. The student should have the following: ID#, name, section, class
3. Create a module containing the section, subject and teacher information
4. Create a module containing student fee information
5. Create a module containing the instructors salary
6. Create a module with the classroom assignments (be mindful that each class/lab should not have the same information as another class)
.
You will create a 13 slide powerpoint presentation (including your r.docxmattjtoni51554
You will create a 13 slide powerpoint presentation (including your reference page) about advocating for adoption.
Be creative in developing a presentation that will highlight an issue, choice/decision, or life altering event that may impact someone's life.
You need to have at least 7 credible references
These will need to be noted within the presentation and at the end of the presentation.
.
You will create a 10 minute virtual tour of a cultural museum” that.docxmattjtoni51554
You will create a 10 minute virtual tour of a “cultural museum” that teaches your audience about a particular culture. The museum that you select must be within the United States. For example, The United States Holocaust Memorial Museum, Art Institute of Chicago, Ellis Island, Charles H. Wright African American Museum, etc. You will create a “virtual tour” of the museum by creating a PowerPoint presentation with at least one slide dedicated to each “room” of the museum. You must provide the history of the museum through the use of visual imagery. You might choose to display some of the objects/artifacts that would be included in the museum, audio or video clips related to the spaces, or text that might appear on the displays or signs at the museum. Be sure you have a title slide with the name of the museum you chose on it. Your final product should be very creative AND very realistic. You will have to do extensive research on the museum that you choose. Your audience should walk away from your presentation with the feeling that they have just left the museum. The audience should also gain new information about the culture that they did not know before your presentation. You will also need to submit a reference page using APA format. This should be primarily a visual tour. Please limit any text on slides to short headings and/or bullet points. I do not require any citations for images/photos.
.
You will continue the previous discussion by considering the sacred.docxmattjtoni51554
You will continue the previous discussion by considering the sacred/secular divide that is often seen within society today. After watching the presentation titled The Sacred/Secular Divide, interact with your classmates by discussing the following questions:
How does the tendency to push religion away from the public arena effect the Christian’s ability to engage culture?
What are the areas within your own life that depict the sacred/secular divide?
How can the sacred/secular divide be eliminated within your sphere of influence?
In your discussion, indicate to which of the points of the Sacred/Secular Divide you are responding throughout your post.
.
You will craft individual essays in response to the provided prompts.docxmattjtoni51554
You will craft individual essays in response to the provided prompts. You must use the current Turabian style with default margins and 12-pt Times New Roman font. For each essay, include a title page and reference page, also in current Turabian format. You must include citations to a sufficient number of appropriate scholarly sources to fully support your assertions and conclusions (which will likely require more than the minimum number of citations). Each paper must contain at least 5
7 scholarly sources
original to this paper
,
The UN— “A More Perfect Union?”
Considering the readings, video presentations, and your own research, draft a quality 6–7-page research paper on the role, legitimacy, and authority of the UN according to the following prompts, answering in a separate or integrated manner as you wish.
Identify at least 3reasons that states might defend the intrinsic legitimacy of the UN as a governing authority. In reverse, identify at least 3reasons that states might criticize its legitimacy and authority.
In short, make an argument for the limits and possibilities of the UN as a legitimate governing authority in a world of sovereign states.
What is the relationship of the UN to the current international system of states?
Considering the reasons for the creation of the UN after WWII, does it seem driven by political necessity or the political utility? In plainer English, do states need the UN more than the UN needs the states? Or do states both large and small find the UN a useful tool for improving their relative power and legitimacy vis-à-vis other states and global institutions? Is there some position in-between?
Using other sources and extra-Scholar sources (The commentaries, teachings, other writings, etc.) to inform your own reasoning, comment on the compatibility with the idea of
World Government
. [
Attention
: The Instructor does not view the question as rhetorical, nor the answer self-evident. So, reason carefully.] For example, if the logic of collective action under the
Articles of Confederation
—the logic of state sovereignty—failed to secure American liberties as well as the ‘more perfect union’, the new Constitution established by the Framers in 1787 to replace it, effectively requiring states to cede sovereignty to a larger collective authority, why would the same logic of collective action not justify the UN as a ‘more perfect union’ to replace an anarchic system of sovereign states putting the world at risk in a nuclear age?
.
You will complete the Aquifer case,Internal Medicine 14 18-year.docxmattjtoni51554
You will complete the Aquifer case,
Internal Medicine 14: 18-year-old female for pre-college physical
,
focusing on the
“Revisit three months later”
for this assignment.
After completing the Aquifer case, you will present the case and supporting evidence in a PowerPoint presentation with the following components:
Slide 1: Title, Student Name, Course, Date
Slide 2: Summary or synopsis of Judy Pham's case
Slide 3: HPI
Slide 4: Medical History
Slide 5: Family History
Slide 6: Social History
Slide 7: ROS
Slide 8: Examination
Slide 9: Labs (In-house)
Slide 10: Primary Diagnosis and 3 Differential Diagnoses – ranked in priority
Primary Diagnosis should be supported by data in the patient’s history, exam, and lab results.
Slide 11: Management Plan: medication (dose, route, frequency), non-medication treatment, tests ordered, education, follow-up/referral.
Slide 12-16: An evaluation of 5 evidence-based articles applicable to Ms. Pham’s case: evaluate 1 article per slide.
Include title, author, and year of article
Brief summary/purpose of the study
How did the study support Ms. Pham’s case?
Course texts will not count as a scholarly source. If using data from websites you must go back to the literature source for the information; no secondary sources are allowed, e.g. Medscape, UptoDate, etc.
Slide 17: Reference List
You will submit the PowerPoint presentation in the
Submissions Area by the due date assigned. Name your Case Study Presentation SU_NSG6430_W7_A2_lastname_firstinitial.doc
.
You will complete the Aquifer case,Internal Medicine 14 18-.docxmattjtoni51554
You will complete the Aquifer case,
Internal Medicine 14: 18-year-old female for pre-college physical
,
focusing on the
“Revisit three months later”
for this assignment.
After completing the Aquifer case, you will present the case and supporting evidence in a PowerPoint presentation with the following components:
Slide 1: Title, Student Name, Course, Date
Slide 2: Summary or synopsis of Judy Pham's case
Slide 3: HPI
Slide 4: Medical History
Slide 5: Family History
Slide 6: Social History
Slide 7: ROS
Slide 8: Examination
Slide 9: Labs (In-house)
Slide 10: Primary Diagnosis and 3 Differential Diagnoses – ranked in priority
Primary Diagnosis should be supported by data in the patient’s history, exam, and lab results.
Slide 11: Management Plan: medication (dose, route, frequency), non-medication treatment, tests ordered, education, follow-up/referral.
Slide 12-16: An evaluation of 5 evidence-based articles applicable to Ms. Pham’s case: evaluate 1 article per slide.
Include title, author, and year of article
Brief summary/purpose of the study
How did the study support Ms. Pham’s case?
Course texts will not count as a scholarly source. If using data from websites you must go back to the literature source for the information; no secondary sources are allowed, e.g. Medscape, UptoDate, etc.
Slide 17: Reference List
You will submit the PowerPoint presentation in the
Submissions Area by the due date assigned. Name your Case Study Presentation SU_NSG6430_W7_A2_lastname_firstinitial.doc
.
You will complete several steps for this assignment.Step 1 Yo.docxmattjtoni51554
You will complete several steps for this assignment.
Step 1:
You will become familiar with an assessment tool (AChecker) to examine Web accessibility for a couple Web sites. This is a freely available tool that you can learn about by reviewing the tutorial found
here
.
Step 2:
Select two Web sites that are somewhat similar in functionality. Find one that you think is good and one that you think is bad. Whether or not the Web site is good or bad is based upon your own personal perspective.
Step 3:
Examine the Web sites regarding your suggestions as to how they might be improved.
Step 4:
Create a PowerPoint presentation that includes 10–12 slides with voice recording that presents your recommended improvements. Discuss the good and bad factors of each Web site. Discuss how a sample task is supported on each of the Web sites. Describe how the Web site can be redesigned or revised to achieve better results.
The requirements for the presentation are as follows:
Title slide
Introduction to the 2 Web sites
Comparison of the 2 Web sites
A summary of AChecker's findings for each site
Explanation of how to improve the sample task
Listing of recommended improvements
Information regarding anticipated localization and globalization factors
Summary and conclusions
At least 3–5 references
Be sure to consider the following:
Patterns
Wizards
Interactivity
Animation
Transitions
.
You will compile a series of critical analyses of how does divorce .docxmattjtoni51554
You will compile a series of critical analyses of "how does divorce effect the wellness of children?" through the four general education lenses: history, humanities, natural and applied sciences, and social sciences. Using the four lenses, explain "how does divorce effect the wellness of children?" within wellness has or has not influenced modern society.
.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
phychem1phychem2Lab 9 Chemical Reactions IIPre-lab Qu.docx
1. phychem1phychem2
Lab 9: Chemical Reactions II
Pre-lab Questions
1. What is a limiting reagent?
2. A student used 7.15 g of CaCl2 and 9.25 g of K2CO3 to make
CaCO3. The actual yield was 6.15 g of CaCO3. Calculate the
limiting reagent and the percent yield.
Experiment: Synthesis of Garden Lime
Procedure
**Take photographs of your experiment set up and your results.
Submit them with your laboratory report.**
1. Table 1 provides an example set of data for 1.0 g CaCl2.
2. For Trial 1, weigh into a 250 mL beaker the amount of
calcium chloride (CaCl2) shown in Table 1. Record the exact
mass you weigh out in the Trial 1 column of the Data section.
3. Measure 50.0 mL of distilled water into a 100 mL graduated
cylinder. Pour the water into the 250 mL beaker with the
calcium chloride.
4. Stir the solution with a stirring rod until all of the calcium
chloride is dissolved.
5. Weigh out 2.5 g of potassium carbonate (K2CO3) in a 50 mL
beaker. Record the exact mass in the Data section.
6. Measure 25.0 mL of distilled water into a 100 mL graduated
cylinder. Add the water into the 50 mL beaker containing the
2. potassium carbonate.
7. Stir the potassium carbonate in the distilled water with a
stirring rod until it is all dissolved.
8. Pour the K2CO3 solution into the 250 mL beaker that has the
CaCl2 solution. Rinse the beaker that contained the K2CO3 with
a few mL of water and add this to the CaCl2 solution. Stir the
mixture.
9. As soon as the reaction begins, record your observations in
the Data section. Continue stirring until you see no more
precipitate forming.
10. Set up the funnel in the Erlenmeyer flask as shown in Figure
2.
HINT: Do NOT begin filtering yet!
11. Zero the scale and weigh a piece of filter paper and a watch
glass. Record the masses of both items in the Data section.
12. Prepare a filtering funnel as shown in Figure 2: fold a piece
of filter paper in half twice to make quarters, and open the
paper to make a small cone (three quarters are open on one side
and one quarter is on the opposite side). Place the paper cone
into the funnel and hold it in place with your fingers. Pour a
small amount of distilled water through the paper to secure it
inside the funnel.
13. Filter the mixture by pouring it into the filter paper in the
funnel. Use the stirring rod and distilled water in a wash bottle
to transfer the entire solid into the filter paper.
HINT: For best results, be sure to transfer all of the precipitate
into the filter paper. Use a rubber policeman if it is available to
help with the transfer.
14. Rinse the remaining solid in the filter paper twice with
distilled water from a wash bottle to rinse off excess sodium
chloride (NaCl). After all the liquid has filtered through, rinse
the product with approximately 5 mL of ethanol to aid in its
drying. Allow the ethanol to completely finish filtering through
the paper.
3. 15. Remove the filter paper carefully so as to not lose any
product. Gently unfold the filter paper and lay it flat on the pre-
weighed watch glass to dry.
16. Allow the product to air dry completely. This may take 24
hours or more. Once dry, weigh the dry product on the filter
paper and watch glass. Record the total mass in the Data
section. Calculate the mass of the product.
17. Repeat the above procedure for Trial 2 using the amount of
CaCl2 mass indicated in Table 1.
18. To clean up, wash any dirty glassware, pour liquids down
the drain, and throw the product on the filter paper in the trash.
Data
1. Record your data for each of the trials in Table 2.
2. Record your reaction observations (Step 8) below:
Table 2: Reaction Product Data
Mass (g)
Example
Trial 1
Trial 2
Mass of CaCl2
1.0 g
Mass of K2CO3
2.5 g
4. Mass of filter paper
0.8 g
Mass of watch glass
38.5 g
Combined mass of product, filter paper, and watch glass
40.2 g
Mass of dry product
0.9 g
Calculations
1. Determine the limiting reagent for each trial. Show your
calculations.
Hint: See the example in the Introduction.
Example:
Trial 1:
Note: These should be about the same and either CaCl2 or
K2CO3 can be the limiting reagent depending on their initial
masses.
Trial 2:
5. Table 4: Comparison of Theoretical and Actual Yields for
CaCO3
Trial #
Limiting Reagent
Theoretical Yield of CaCO3
Actual Yield of CaCO3
% Yield
Trial 1
Trial 2
Trial 3
2. Calculate the theoretical yield of CaCO3 that could be
produced by each trial and then fill in Table 2.
3. Find the percent yield each trial obtained for the CaCO3.
Post-lab Questions
1. Take photographs of your experiment set up and you results.
Submit them with your laboratory report.
7. reaction.
The quicklime is slaked to form lime plaster.
CaO + H2O → Ca(OH)2
This is a
____________________________________________reaction.
The lime plaster is cured or dried.
Ca(OH)2 + CO2 → Ca(OH)(HCO3)
This is a ____________________________________________
reaction.
This quickly continues to react to form calcium carbonate and
water.
Ca(OH)(HCO3) → CaCO3 + H2O
This is a ____________________________________________
reaction.
Frescos will deteriorate over time when exposed to the damp,
acidic environments typical of modern urban city atmospheres.
CaCO3 + H2SO4 → CaSO4 + H2O + CO2
This is a ____________________________________________
reaction.
2. Balance each of the chemical equa_ons you will be doing in
this laboratory exercise.
Combustion:
C4H10 (g) + O2 (g) → CO2 (g) + H2O(g)
Synthesis:
Hb (s) + O2 → HbO2 (s)
8. Single Replacement:
Zn (s) + H3C6H5O7 (aq) → Zn3(H3C6H5O7)2 (aq) + H2 (g)
Double Replacement:
Zn(C2H3O2)2 (aq) + Na3PO4 (aq) → NaC2H3O2 (aq) +
Zn3(PO4)2 (s)
Decomposition:
(NH4)2CO3 (s) → NH3 + H2O + CO2 (g)
Experiment: Getting to Know your Reactions
Procedure
**Take photographs of your experiment set up for Parts 1 - 5
and your results. Submit them with your laboratory report.**
Part 1: Combustion
C4H10 (g) + O2(g) → CO2 (g) + H2O (g)
1. Light a butane lighter and observe the flame. (The ignition of
the flame is a reaction between butane and the oxygen in the air
you breathe.)
2. Record your observations in the data table from when the
lighter is turned on until it is turned off.
Part 2: Synthesis (A + B → C)
Hb(s) + O2 → HbO2 (s)
1. Take a deep breath, hold it as long as possible and then
exhale. Visualize the reaction occurring.
2. Record your observations before inhaling and a>er you
exhale.
9. 3. Construct an oxyhemoglobin molecule with modeling clay
and toothpicks.
Hint: See figure of molecule in introduction as a guide.
4. Take a photograph of your model and submit it with your
laboratory report.
Part 3: Single Replacement (A + BC → AC + B)
Zn (s) + H3C6H5O7 (aq) → Zn3(C6H5O7)2 (aq) + H2 (g)
1. Place a test tube in a test tube rack or small beaker.
2. Slightly tilt a test tube and slide a small zinc-coated
(galvanized) washer down the side.
3. Use a 10 mL graduated cylinder to measure out
approximately 2 mL of saturated citric acid and carefully pour it
into the test tube containing the zinc washer.
CAUTION: Citric acid is irritating to the eyes and skin.
4. Observe the reaction for several minutes, and record your
observations in the data table.
5. To clean up, separate the acid solution from the washer by
pouring it into a small beaker while leaving the washer in the
test tube. This is called decanting. Rinse the test tube
containing the washer several times with water and add each
rinse to the beaker.
CAUTION: Do not pour the acid directly down the drain. To
neutralize the acid, add small amounts of baking soda to the
solution in the beaker and stir with a stirring rod.
6. Continue stirring and adding small amounts of baking soda
until gas no longer forms. Pour the liquid down the drain and
throw the washer in the trash.
Part 4: Double Replacement (AB + CD → CB + AD)
Zn(C2H3O2)2 (aq) + Na3PO4 (aq) → NaC2H3O2 (aq) +
Zn3(PO4)2 (s)
1. Pour approximately 2 mL of 0.1 M zinc acetate
(Zn(C2H3O2)2) into a clean test tube.
2. Add approximately 2 mL of 0.1 M sodium phosphate tribasic
(Na3PO4) into the test tube.
10. 3. Record your observations before and after the addition of
Na3PO4 in the data table.
4. To clean up, pour the contents of the test tube down the
drain.
Part 5: Decomposition (AB → A + B)
(NH4)2CO3 (s) → NH3 + H2O + CO2 (g)
1. Place a spatula tip full (approximately 0.02 g) of ammonium
carbonate (NH4)2CO3, powder into a test tube.
CAUTION: Do not inhale the strong ammonia odor. Try to work
in well-ventilated area.
2. Light the candle using the butane lighter.
CAUTION: Long hair should be tied up and loose clothing
restrained when around an open flame to prevent fire and burns.
Be sure you are wearing your safety goggles.
3. Use a test tube holder to hold the test tube containing the
ammonium carbonate at a slight angle in the candle flame. Keep
the open end of the tube pointed away from you and other
students. Continue to heat the sample until the reaction is
finished.
Hint: Remember the products of this reaction are all gases.
4. Record your observations in the Data section.
5. Allow the test tube to cool to room temperature before
touching it.
CAUTION: The test tube will be very hot and can burn your
skin if touched before it cools.
Hint: After the test tube has cooled for a few seconds, place it
in a small beaker or test tube rack to finish cooling.
6. Extinguish the candle. Wash out the test tube with soap and
water.
Data
Table 1: Reaction Observations, Parts 1-5
Substance
Before the Reaction
After the Reaction
11. Combustion
Synthesis
Single Replacement
Double Replacement
Decomposition
Post-lab Questions
1. Take photographs of your experiment set up for Parts 1-5,
including the oxyhemoglobin molecular model from Part 2:
Synthesis. Submit them with your laboratory report.
2. Write the combustion reaction that occurs when you cook out
on a propane gas grill. Propane has the chemical formula C3H8.
Make sure to balance the reaction equation.
3. Balance the following equations and identify the type of
reaction.
a. BaCl2 (s) + K2SO4 (aq) → BaSO4 (s) + KCl (aq)
b. KClO3 (s) → KCl (s) + O2(g)
13. Procedure
**Take photographs of your experiment set up and your results.
Submit them with your laboratory report.**
1. Label the two test tubes with a permanent marker as A and B.
HINT: Make sure to write down which rinse is A and which is
B.
2. Pour 10 mL of Rinse A into the test tube marked A.
3. Pour 10 mL of Rinse B into the test tube marked B.
HINT: If using the same graduated cylinder to measure your
rinses, wash the cylinders WELL between pours to prevent
cross-contamination.
4. Pour 3 mL of 1 M Ca(C2H3O2)2 solution into each of the test
tubes. Gently stir each test tube with a stir rod to mix. Be sure
to clean your stir rod each time before placing it in a solution.
CAUTION: Mixing should be done gently to prevent glass
breakage and injury.
5. Observe and record initial observations immediately after
adding calcium acetate to the test tubes.
6. Observe the reactions for at least 10 minutes to ensure it is
finished. HINT: A positive test is indicated by a cloudy
appearance of the solution. The precipitate formed can be more
easily seen if the test tube is held up to the light. The
precipitate will eventually settle to the bottom of the test tube.
7. Let the test tubes sit for an hour. After an hour, record final
observations.
8. Record all observations in the Data section.
9. To clean up, you can rinse the small amount of precipitate
down the drain.
Data
· Observations of NaF and Ca(C2H3O2)2 (see sequence of
pictures below)
15. 1. What two conditions are considered when determining
whether a molecule is polar or non-polar?
2. What determines if a bond is polar?
3. List several examples of polar molecules.
4. List several examples of non-polar molecules.
5. What is the rule when using polar and non-polar solvents?
Experiment: Slime Time
Some inks are polar while others are non‐polar. A polar solvent
will pick up polar inks, while a non‐polar solvent will pick up
non‐polar inks. In this lab you will use inks to identify slime
and silly putty as polar or non‐polar. You will also use paper
chromatography to verify the inks are correctly identified as
polar or non‐polar.
Procedure
**Take photographs of your experiment for Parts 1, 2, and 3;
and your results. Submit them with your laboratory report.**
16. Part 1: Making Slime
1. Weigh out 0.5 g of guar gum into a 250 mL beaker.
2. Measure 50.0 mL of distilled water into a 100 mL graduated
cylinder and pour it into the 250 mL beaker that contains the
guar gum.
3. Rapidly stir the mixture with a stirring rod for at least 3
minutes and until the guar gum is dissolved.
4. Measure 4.00 mL of a 4% Borax solution into a 10 mL
graduated cylinder and add it to the guar gum and water.
5. Stir the solution until it becomes slime. This will take a few
minutes. If the slime remains too runny, add an additional 1.0
mL of the 4.0% Borax solution and continue to stir until the
slime is the right consistency.
6. Once you are satisfied with the slime, pour it into your
hands. Be sure not to drop any of it on to the floor.
7. Manipulate the slime in your hands. Write down observations
made about how slime pours, stretches, breaks, etc.
CAUTION: Slime is slippery and if dropped it can make the
work area slick.
8. Place the slime back into the beaker and WASH YOUR
HANDS.
Part 2: Slime and Putty Ink Tests
1. On a piece of notebook paper make one 20-25 mm long mark
of each of the inks you are testing. Space the marks at least one
inch apart. Use a pencil to label each mark with its description.
a. Water soluble inks include those in highlighters and certain
pens.
b. Water insoluble inks include those in permanent
pens/markers, newsprint, and a dry-erase markers.
2. While the inks are drying, select a passage or a picture in the
newspaper to test with the slime.
3. Break off a small piece of slime that is 3 - 5 cm in diameter.
Gently place this piece on top of the newspaper print, and then
carefully pick it up again.
4. Observe and record in Table 1 whether or not the ink was
17. picked up onto the slime.
5. Break off another small piece of slime. Once the inks from
Step 1 have dried, gently place the slime on top of the first spot
on the notebook paper, and then carefully pick it up. Repeat this
for each of the inks. Observe and record which inks were picked
up (dissolved) by the slime in Table 1.
6. Repeat this ink testing two more times for accuracy.
7. Before performing ink tests on silly putty, in the Data
section, hypothesize which inks the silly putty will pick up.
8. Perform ink tests on silly putty in the same manner as above.
Record your results in Table 2
Part 3: Chromatography of Ink Samples
1. Use a pencil or scissors to poke a small hole in the center of
a piece of filter paper (see Figure 4).
2. Spot the filter paper evenly spaced approximately 2 cm from
the small hole with the two insoluble inks and the two soluble
inks that were used in Part 2.
3. Obtain a ½ piece of filter paper. Fold the paper in half
several times so that it makes a narrow wick.
4. Insert the wick into the hole of the spotted paper so that it is
above the top of the filter paper by approximately 2 cm.
5. Fill a 250 mL beaker 3/4 full with water.
6. Set the filter paper on top of the beaker so that the bottom of
the wick is in the water. The paper should hang over the edge
of the beaker with the spotted side up.
7. Allow water to travel until it is approximately 1 cm from the
edge of the filter paper. Remove the filter paper from the
beaker.
8. Observe which inks moved from where they were originally
spotted. Record your observations in Part 3 of the Data section.
18. Data
Part 1
· Slime Observations:
Part 2
Table 1: Results of Ink Testing for Slime
Name of Ink
Picked up (dissolved)
Did not pick up
Test 1
Test 2
Test 3
Test 1
Test 2
Test 3
Newsprint
Highlighter
19. Roller ball pen
Sharpie marker
Dry-erase marker
· Hypothesis for Silly Putty (Procedure Part 2, Step 7):
Table 2: Results of Ink Testing for Silly Putty
Name of Ink
Picked up (dissolved)
Did not pick up
Test 1
Test 2
20. Test 3
Test 1
Test 2
Test 3
Newsprint
Highlighter
Roller ball pen
Sharpie marker
Dry-erase marker