This document discusses precipitation reactions and provides information on:
- Types of precipitation reactions and how to determine if a product is soluble or insoluble using solubility rules.
- How to predict if a precipitation reaction will occur by assigning oxidation states, writing molecular, complete ionic, and net ionic equations.
- How to perform stoichiometric calculations involving precipitation reactions, including determining moles or mass of reactants and products.
- Key concepts related to solutions including molarity, using molarity in calculations, dilution, and limiting reagents.
Solubility and precipitation equilibrium .pptxFatmaBITAM
This course of analytical chemistry is distinated to students of chemistry, Pharmacy and biology. It is concerning the equilibrium of solubility and precipitation of salts. The constants of this equilibrium and effecting factors are given with some examples demonstrations
Solubility is the amount of solute that will dissolve in a given amount of solution at a particular temperature (in grams or moles)
•
The molar solubility (mol/L) is the number of moles of solute that will dissolve in 1L of a saturated solution.
•
The molarity of the dissolved solute in a saturated solution.
•
Solubility (g/L) is the number of grams of solute dissolved in 1 L of a saturated solution.
•
A saturated solution contains the maximum amount of solute possible at a given temperature in equilibrium with an undissolved excess of the substance.
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Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Solubility and precipitation equilibrium .pptxFatmaBITAM
This course of analytical chemistry is distinated to students of chemistry, Pharmacy and biology. It is concerning the equilibrium of solubility and precipitation of salts. The constants of this equilibrium and effecting factors are given with some examples demonstrations
Solubility is the amount of solute that will dissolve in a given amount of solution at a particular temperature (in grams or moles)
•
The molar solubility (mol/L) is the number of moles of solute that will dissolve in 1L of a saturated solution.
•
The molarity of the dissolved solute in a saturated solution.
•
Solubility (g/L) is the number of grams of solute dissolved in 1 L of a saturated solution.
•
A saturated solution contains the maximum amount of solute possible at a given temperature in equilibrium with an undissolved excess of the substance.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
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.
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.
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
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Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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2. Types of Reactions – PPT
• Precipitation Reactions – mix two aqueous
solutions and one product is insoluble
• Precipitate – an insoluble solid compound
formed during a chemical reaction
• Use the solubility rules to determine if a
product is soluble or insoluble
– Yes, you must memorize these
6. Solubility Rules
Gas Formation:
With Acidic solutions:
o Any sulfide (S2-) compound and any acid forms H2S(g)
and a salt
o Any carbonate (CO3
2-) compound and any acid form
CO2(g), H2O(l) and a salt
o Any sulfite (SO3
2-) compound and any acid form SO2(g),
H2O and a salt
With Basic Solutions:
o Any ammonium (NH4
+) compound and any soluble
strong hydroxide form NH3(g), H2O and a salt
7. Memorize These Rules
Soluble:
1. Alkali metals (Group1), ammonium ion (NH4
+),
Nitrates (NO3
-),Acetates (C2H3O2
-), hydrogen
carbonate (HCO3
-), chlorates (ClO3
-)
1. Chlorides,Bromides,and Iodides
exceptions:Pb2+, Ag+,and Hg2
2+ are insoluble
1. Sulfates (SO4
2-)
exceptions:Sr2+, Ba2+, Pb2+,Ag+,Ca2+ and Hg2
2+ are
insoluble
Insoluble:(exceptions:Group1, NH4
+)
1. Carbonates (CO3
2-), Phosphates (PO4
3-), and
Sulfides(S2-)
1. Hydroxides(OH-)
exceptions: Ca2+, Sr2+, Ba2+ are soluble
3. Chromates (CrO4
2-)
exceptions: Ca2+, Mg2+ are soluble
GasFormingWithAcidicsolutions:
1. Any sulfide(S2-) compound and any acid forms H2S(g)
and a salt
1. Any carbonate (CO3
2-) compound and any acid form
CO2(g), H2O(l) and a salt
1. Any sulfite(SO3
2-) compound and any acid form SO2(g),
H2O and a salt
GasFormingWithBasicSolutions:
1. Any ammonium (NH4
+) compound and any
solublestrong hydroxide form NH3(g),H2O
and a salt
8. Solubility Rules
Determine whether the following compounds
are soluble or insoluble in water:
PbCl2
KI
Li2CO3
Lead (II) nitrate
Calcium carbonate
Silver (I) bromide
11. Assigning Oxidation States
1. Free element = 0
2. Total charge = 0 or the charge of the ion
3. Group 1 = +1; Group 2 = +2
4. Hydrogen = +1; Fluorine = -1
5. Oxygen = -2
6. Grp 17 = -1; Grp 16 = -2; Grp 15 = -3
Assign oxidation states to each element in:
K2Cr2O7 FeS2O3 Ni3P4 NaH
12. Predicting Precipitation Reactions:
2. Perform a double replacement
reaction to predict the possible
products by exchanging the cation
and anion partners
15. Predicting Precipitation Reactions:
5. a. If neither product is
a solid or a liquid or a
gas, then “NR” no
reaction occurs
b. If one product is a
solid or a liquid or a
gas, then write a
complete ionic
equation
16. Predicting Precipitation Reactions:
6. Circle the solid product and the ions
that made the product – write them down
on a new line and BALANCE the net
ionic equation
17. Types of Reactions – PPT
• Molecular Equation – a chemical equation where
the reactants and products are written as if they
were molecular substances even though they
may actually exist in solution as ions
• Example of a molecular equation:
Ca(OH)2(aq) + Na2CO3(aq) CaCO3(s) + 2 NaOH(aq)
18. Types of Reactions – PPT
• Complete Ionic Equation – a chemical equation
where aqueous ionic compounds are written as
separate ions in the solution
• Molecular Equation: Ca(OH)2(aq) + Na2CO3(aq) CaCO3(s) + 2 NaOH(aq)
• Complete Ionic Equation:
Ca2+ + OH- + Na+ + CO3
2- CaCO3(s) + Na+ + OH-
19. Types of Reactions – PPT
• Net Ionic Equation – an ionic equation from
which spectator ions have been omitted
• Spectator Ions – an ion that does not
participate in the reaction
21. Types of Reactions – PPT
Predict whether a reaction will occur in each of the
following cases. If a reaction does occur, write a net
ionic equation for the reaction:
1. NaOH(aq) + MgCl2(aq) ?
23. Types of Reactions – PPT
• Stoichiometry of Precipitation Reactions –
works just like a normal stoichiometry
problem but you may need to determine
the “pieces” instead of the compounds
24. Types of Reactions – PPT
How many moles of chloride ions are needed to
precipitate 2.50 g of solid?
Pb(C2H3O2)2(aq) + NaCl(aq) ?
25. Types of Reactions – PPT
What mass of solid is formed when 0.0100
moles of barium chloride and 0.0100 moles
of sodium hydroxide are mixed?
26. Calculations with Solutions
• Concentration – the quantity of solute in a
standard quantity of solution
• We have already used:
Mass percent = mass of solute/100g solution
• A new unit of concentration:
Molarity = moles of solute/1 L solution
27. Calculations with Solutions
Calculating Molarity:
A sample of NaCl weighing 0.0678 g is placed in a
25.0 mL volumetric flask. Enough water is
added to dissolve the NaCl, and then the flask is
filled to the mark with water. What is the
molarity of the resulting solution?
28. Calculations with Solutions
Molarity as a Conversion:
– Allows for conversion between moles of the
solute and liters of a solution
How many milliliters of 0.163 M NaOH are required
to give 0.0958 g of sodium hydroxide?
29. Calculations with Solutions
Molarity and Stoichiometry:
What volume of 0.650 M K2CrO4, in mL, is needed to
precipitate as Ag2CrO4(s) all the silver ions in 415 mL
of 0.186 M AgNO3?
2 AgNO3(aq) + K2CrO4(aq) Ag2CrO4(s) + 2 KNO3(aq)
30. Calculations with Solutions
Molarity and Dilution: Mi x Vi = Mf x Vf
• Only use this equation for diluting samples
(because it is the same compound!)
A solution is 1.5 M H2SO4. How many milliliters of
this acid do you need to prepare 100.0 mL of
0.18 M H2SO4?
31. Calculations with Solutions
Molarity and Limiting Reagents:
75.0 mL of 0.250 M HCl is mixed with 225 mL of 0.055
M Ba(OH)2 . What mass of water is formed?
32. Calculations with Solutions
Making A Solution:
1. Calculate how many grams of the solute
are needed for the desired volume of
solution.
2. Weigh out the solid and put it in a
volumetric flask.
3. Add distilled water to the line on the
volumetric flask.
Prepare 25.0 mL of a 0.20 M solution of MgCl2