Acid Base Titration Lab Assignment - SCH4U h5 - Chemistry, 12, University- VHS
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Procedure
1. Create a data table with the headings and test column
similar to the one on the website.
2. Do the 'Review Tests' first. Click on the test tube icon to
determine what indicates a positive or negative result and
the difference between water soluble and insoluble
compounds. Record your observations in your data table.
3. Click each test tube for the 5 unknowns you've been
assigned and record your observations in your data table.
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page of the Scientific Skills and Formatting module in the introduction unit to
ensure that you follow the proper format.
Note on Writing In Science
All information and relevant data are to be included in a logically sequenced manner. In your writing, it is important to use appropriate writing style, tone, and scientific terminology. Conduct your research using reliable, peer Reviewed and industry sources and ensure that sources listed in your reference list are directly related to information presented in your paper. Use the appropriate referencing style for science to cite your sources. For more information, see the page titled “References” in the Scientific Skills and Formatting module of the Introduction unit in your course.
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Qualitative Analysis of Functional Groups Assignment - SCH4U h5, Chemistry, 1...
SCH4U h5+, Chemistry, 12, University Virtual High School
Unit Assignment: Qualitative Analysis of Functional Groups Assignment
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Qualitative Analysis of Functional Groups Assignment - Virtual High School (V...
Procedure
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similar to the one on the website.
2. Do the 'Review Tests' first. Click on the test tube icon to
determine what indicates a positive or negative result and
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compounds. Record your observations in your data table.
3. Click each test tube for the 5 unknowns you've been
assigned and record your observations in your data table.
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Communicate an analysis of your results in a lab report. Note: there is only ONE
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page of the Scientific Skills and Formatting module in the introduction unit to
ensure that you follow the proper format.
Note on Writing In Science
All information and relevant data are to be included in a logically sequenced manner. In your writing, it is important to use appropriate writing style, tone, and scientific terminology. Conduct your research using reliable, peer Reviewed and industry sources and ensure that sources listed in your reference list are directly related to information presented in your paper. Use the appropriate referencing style for science to cite your sources. For more information, see the page titled “References” in the Scientific Skills and Formatting module of the Introduction unit in your course.
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Submit Files - Final Applied Lab Project
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Final Applied Lab Project
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Final Applied Lab Project
Addresses course outcomes 1-4:
· recognize and explain how the scientific method is used to solve problems
· make observations and discriminate between scientific and pseudoscientific explanations
· weigh evidence and make decisions based on strengths and limitations of scientific knowledge and the scientific method
· use knowledge of biological principles, the scientific method, and appropriate technologies to ask relevant questions, develop hypotheses, design and conduct experiments, interpret results, and draw conclusions
This is the culminating lab assessment in BIOL 103. It is designed to assess your ability to apply the principles of the scientific method.
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Biology 105 Laboratory Fall 2013
Instructor: Ayça Akal-Strader
Guidelines for Lab Report
Lab 2: Quantification of Protein (Bradford Assay)
Your report for Lab 2: Quantification of Protein (Bradford Assay) is due the week of October 7/8/9/10. Please include the following information in your report:
Hypothesis: as usual
Introduction:
• Background/theory of Bradford Assay
• Purpose of the experiment
Results:
In addition to the specific data discussed below, your Results section should always include one or more paragraphs of text that provide:
• A brief description of the procedure
• Explanations of any charts, graphs, figures, or calculations that are included
• Statements about the most interesting/noteworthy data
Data:
1. Table of measured absorbances (like Table 2 on p. 31).
2. Table showing protein concentrations of unknowns (like Table 3 on p. 31). Say which unknowns—1, 2, or both—you used.
**Please re-make the tables for your report. DO NOT simply tear out p. 31 from your lab manual and staple it to your report.
3. Standard Curve:
• Label with title and caption
• Label axes: x-axis = Concentration (μg/ml); y-axis = Absorbance at 595 nm. Be sure to include units on Concentration. Remember that absorbance (optical density; OD) has no units.
• Plot points, leaving room to plug in your unknown absorbances to find their concentrations
• Connect the dots
(Note: Do NOT draw a straight line—unless your data really looks like a straight line. The samples we measured did not fall into the “linear range” of the spectrophotometer, and everyone’s data that I saw flattened out a lot at the high concentration end of the range. Connect your data points with a curve.)
• Indicate by drawing horizontal and vertical lines how you found the concentration of your unknowns.
Discussion:
• Did your results match your expectations? If not, why not?
• Did you have any difficulty finding the concentration of any of your unknowns?
• Do you think your measurement of protein concentration was accurate? Did your duplicates agree well? For your standards, did your absorbances increase as your protein concentrations increased?
Conclusion: as usual
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The document describes an experiment to investigate how different solutions (acidic, neutral, basic) affect the reduction of manganese. Students are instructed to add a potassium permanganate solution to beakers containing acidic, neutral, and basic solutions of sodium hydrosulfite and observe the resulting reactions. They are asked to record initial and final pH measurements, concentrations of aqueous species, colors, and any solid materials produced. The results show that an acidic solution produces a pink color and manganese(II) ions, a neutral solution remains colorless and produces manganese dioxide, and a basic solution turns green and produces less manganese dioxide. Students are then asked to write a formal lab report following the proper scientific format and style to communicate
(CHE 276) Organic Chemistry Laboratory .docx
(CHE 276) Organic Chemistry Laboratory Lab References
Totah rev. 8/2011
5
The Laboratory Notebook
Your notebook will serve as a permanent record of your experimental work. It will contain the
information you need to complete your work efficiently and safely, and you will use the information
contained in your notebook to write laboratory reports explaining your results. For these reasons, it is
important that your notebook be complete and accurate. As a general rule, a good notebook is one from
which someone else can repeat your experimental work in the same way that you have done it.
I. General Guidelines:
1. Your notebook must be bound, the pages numbered, and have a carbon copy.
2. Write your name, the course name, and section # on the cover or front page.
3. Always use permanent ink, not pencil.
4. Write it down NOW. Your notebook is a log of what you do as you do it.
5. Use complete sentences.
6. Write everything in your notebook. Weights, temperatures, everything! When recording
experimental data, always include units.
7. Do not erase! If you make an error, draw a single line through it, and continue. The original
statement should still be legible.
8. Never remove original pages from your notebook. You may remove carbon copies.
9. Date every page as you use it.
10. Write legibly! If your notebook is illegible it will not be graded.
II. The Notebook:
Each experiment recorded in your notebook should contain the sections outlined below. A carbon
copy of your notebook pages will be collected at the end of each laboratory period and will graded as
a part of your lab report. Late notebook pages will not be accepted.
Sections A - E must be completed before you begin the experiment. This is the prelab. Your TA will
verify that this section is complete. You will not be allowed to proceed with the experiment if you
have not completed the prelab.
Section F, the Experimental, is recorded as you proceed each day.
Prelab: Completed before you arrive.
A. Title:
Give the experiment an accurate, descriptive title.
B. Purpose:
Discuss the general purpose of the experiment in two or three sentences. If the experiment is a
synthesis (as opposed to a technique), write the chemical equation, including reagents and
expected product(s). For multistep syntheses, write one equation for each transformation, including
the preparation of reagents.
(CHE 276) Organic Chemistry Laboratory The Laboratory Notebook
6
Totah rev. 8/2011
C. References:
Cite the reference upon which your experimental procedure is based. In most cases this will be
your laboratory manual and/or a supplemental handout. Also cite the source(s) of the information
found in the Chemical Properties & Safety table (part D).
D. Chemical Properties & Safety:
Make a table that lists the chemical properties of all reactants, reag.
(CHE 276) Organic Chemistry Laboratory .docx
(CHE 276) Organic Chemistry Laboratory Lab References
Totah rev. 8/2011
5
The Laboratory Notebook
Your notebook will serve as a permanent record of your experimental work. It will contain the
information you need to complete your work efficiently and safely, and you will use the information
contained in your notebook to write laboratory reports explaining your results. For these reasons, it is
important that your notebook be complete and accurate. As a general rule, a good notebook is one from
which someone else can repeat your experimental work in the same way that you have done it.
I. General Guidelines:
1. Your notebook must be bound, the pages numbered, and have a carbon copy.
2. Write your name, the course name, and section # on the cover or front page.
3. Always use permanent ink, not pencil.
4. Write it down NOW. Your notebook is a log of what you do as you do it.
5. Use complete sentences.
6. Write everything in your notebook. Weights, temperatures, everything! When recording
experimental data, always include units.
7. Do not erase! If you make an error, draw a single line through it, and continue. The original
statement should still be legible.
8. Never remove original pages from your notebook. You may remove carbon copies.
9. Date every page as you use it.
10. Write legibly! If your notebook is illegible it will not be graded.
II. The Notebook:
Each experiment recorded in your notebook should contain the sections outlined below. A carbon
copy of your notebook pages will be collected at the end of each laboratory period and will graded as
a part of your lab report. Late notebook pages will not be accepted.
Sections A - E must be completed before you begin the experiment. This is the prelab. Your TA will
verify that this section is complete. You will not be allowed to proceed with the experiment if you
have not completed the prelab.
Section F, the Experimental, is recorded as you proceed each day.
Prelab: Completed before you arrive.
A. Title:
Give the experiment an accurate, descriptive title.
B. Purpose:
Discuss the general purpose of the experiment in two or three sentences. If the experiment is a
synthesis (as opposed to a technique), write the chemical equation, including reagents and
expected product(s). For multistep syntheses, write one equation for each transformation, including
the preparation of reagents.
(CHE 276) Organic Chemistry Laboratory The Laboratory Notebook
6
Totah rev. 8/2011
C. References:
Cite the reference upon which your experimental procedure is based. In most cases this will be
your laboratory manual and/or a supplemental handout. Also cite the source(s) of the information
found in the Chemical Properties & Safety table (part D).
D. Chemical Properties & Safety:
Make a table that lists the chemical properties of all reactants, reag ...
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This document discusses the titration of hydrated oxalic acid with a sodium hydroxide solution of unknown concentration. The titration reaction is used to determine the molarity of the sodium hydroxide solution. Phenolphthalein indicator is added, which causes the solution to change from colorless to light pink at the endpoint of the reaction. By performing the titration and calculating the moles of sodium hydroxide reacted, the experimenter determined the molarity of the sodium hydroxide solution to be 0.21M. Issues that affected the precision of the results are also discussed, such as using too much acid volume past the endpoint. Recommendations for improving technique include avoiding bubbles in the
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This document is a report on an acid-base titration experiment. The experiment investigated the properties of weak acids like acetic acid and phosphoric acid at different pH levels. The pKa values of the acids were determined by titrating samples with 0.1M NaOH and measuring the pH changes. For acetic acid, the pKa value determined from the graph was 5.52 compared to the theoretical value of 4.76. For phosphoric acid, the pKa values determined were 3.21, 7.44, and 12.24 compared to the theoretical values of 2.15, 7.20, and 12.35. The report concludes that titration can be used to identify the pKa of an
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1) The document describes acid-base titration techniques, including defining terms like equivalence point and end point.
2) It discusses different types of titrations including strong acid-strong base, weak acid-strong base, and constructing titration curves.
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Here are the key points I learned from this lesson:
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- For strong acid-strong base titrations, the pH at the equivalence point is always 7. The titration curve shape is the same whether titrating acid or base.
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This document discusses acid-base titrations and summarizes the key steps in standardizing a sodium hydroxide (NaOH) solution and using it to determine the concentration of acetic acid in vinegar. It explains that NaOH is hygroscopic and absorbs moisture, so it must be standardized against a primary standard, potassium hydrogen phthalate (KHP), through titration. The standardized NaOH solution can then be used to titrate vinegar against it and calculate the moles and molarity of acetic acid present. It also discusses concepts like the pH at the equivalence point of a titration involving a weak acid and strong base.
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Final Applied Lab Project-BIOL 103The Effect of low pH on Enzyme A.docx
Final Applied Lab Project-BIOL 103The Effect of low pH on Enzyme Activity
Design an experiment in which you will test the effect of an acidic fluid on enzymatic activity. Recall: enzymes are proteins! To complete this project, it may be useful for you to first review the Scientific Method Tutorial, the OLI module about pH and enzymes, Lab 1 (Introduction to Science) and Lab 4 (Enzymes). As you review Lab 4, you will be reminded that there are several factors that impact enzymatic activity: pH, temperature, and amount of reagent. It is OK to use the same enzyme/substrate/method as you did in lab 4 (but modify the treatment), but you are encouraged to search on-line to find a different enzyme/substrate/method for measuring enzyme activity for your project (include all references).
As you design your experiment for this project, please remember that you are trying to examine how an acidic fluid will modify the outcome of an enzymatic reaction. To successfully complete this project, you will need to identify the question(s) being asked in your experiment and the hypothesis that you are testing. In your experimental design, you must clearly explain what you are doing. That means that you will need to identify the enzyme, the substrate, the acidic fluid used as treatment, the control treatment and the method of measuring enzyme activity, as well as explain your experimental protocol. You must also thoroughly explain how the acidic fluid impacted enzyme activity based on the results from your own experiment as well as knowledge of enzymes and pH from the OLI modules, lab manual and potentially additional information sources.
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Final Applied Lab Project
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Final Applied Lab Project
Addresses course outcomes 1-4:
· recognize and explain how the scientific method is used to solve problems
· make observations and discriminate between scientific and pseudoscientific explanations
· weigh evidence and make decisions based on strengths and limitations of scientific knowledge and the scientific method
· use knowledge of biological principles, the scientific method, and appropriate technologies to ask relevant questions, develop hypotheses, design and conduct experiments, interpret results, and draw conclusions
This is the culminating lab assessment in BIOL 103. It is designed to assess your ability to apply the principles of the scientific method.
The Effect of low pH on Enzyme Activity
Design an experiment in which you will test the effect of an acidic fluid on enzymatic activity. Recall: enzymes are proteins! To complete this project, it may be useful for you to first review the Scientific Method Tutorial, the OLI module about pH and enzymes, Lab 1 (Introduction to Science) and Lab 4 (Enzymes). As you review Lab 4, you will be reminded that there are several factors that impact enzymatic activity: pH, temperature, and amount of reagent. It is OK to use the same enzyme/s ...
Analysis of UA Metabolites in Urine by HPLC
This experiment uses HPLC-MS to analyze four compounds (uric acid, 6-aminouracil, triuret, and allantoin) in human urine samples. Standard solutions of the target compounds are prepared and used to generate calibration curves. These curves are used to quantify the target compounds in urine samples after being run through HPLC-MS. The limit of detection and limit of quantitation for each compound are estimated from the calibration curves to determine the lowest detectable and quantifiable concentrations.
hplc trouble shooting - final.ppt
This document provides tips and tricks for troubleshooting problems with HPLC systems. It outlines a 5-step troubleshooting strategy of identifying the problem, determining the cause, isolating the exact cause, rectifying the problem if possible, and getting help from maintenance. Common problems like no peaks, no flow, pressure issues, and peak issues are described along with probable causes and remedies. The guidelines provide a logical process for isolating and resolving chromatography issues.
Care and use manual waters x bridge columns
This document provides guidance on using Waters XBridge chromatography columns. Key points:
- XBridge columns offer excellent peak shape, efficiency, and stability across a range of pH and mobile phases. Each column undergoes quality testing to ensure reproducible performance.
- Proper column installation, equilibration, and efficiency testing are described to optimize column life and separation quality. Sample preparation tips help avoid contamination.
- Operating guidelines cover using guard columns, pH limits, solvents, pressures, and temperatures for different XBridge chemistries. Troubleshooting tips and column storage procedures ensure long term column usability.
LamiaFinal data ( results).docx1- label all lanes, label ma.docx
Lamia/Final data ( results).docx
1- label all lanes, label marker sizes, and indicate which three lanes, containing at least one BSA sample and one E. coli sample, you are writing about.
2- lanes 2, 5, 6, 9, and 11 are BSA, lanes 14 and 15 are empty, and lanes 3, 4, 7, 8, 10, 12, and 13 are E. coli.
Lamia/Graphing page.pdf
Lamia/Guidelines.doc
Biology 105 Laboratory Fall 2013
Instructor: Ayça Akal-Strader
Guidelines for Lab Report
Lab 2: Quantification of Protein (Bradford Assay)
Your report for Lab 2: Quantification of Protein (Bradford Assay) is due the week of October 7/8/9/10. Please include the following information in your report:
Hypothesis: as usual
Introduction:
• Background/theory of Bradford Assay
• Purpose of the experiment
Results:
In addition to the specific data discussed below, your Results section should always include one or more paragraphs of text that provide:
• A brief description of the procedure
• Explanations of any charts, graphs, figures, or calculations that are included
• Statements about the most interesting/noteworthy data
Data:
1. Table of measured absorbances (like Table 2 on p. 31).
2. Table showing protein concentrations of unknowns (like Table 3 on p. 31). Say which unknowns—1, 2, or both—you used.
**Please re-make the tables for your report. DO NOT simply tear out p. 31 from your lab manual and staple it to your report.
3. Standard Curve:
• Label with title and caption
• Label axes: x-axis = Concentration (μg/ml); y-axis = Absorbance at 595 nm. Be sure to include units on Concentration. Remember that absorbance (optical density; OD) has no units.
• Plot points, leaving room to plug in your unknown absorbances to find their concentrations
• Connect the dots
(Note: Do NOT draw a straight line—unless your data really looks like a straight line. The samples we measured did not fall into the “linear range” of the spectrophotometer, and everyone’s data that I saw flattened out a lot at the high concentration end of the range. Connect your data points with a curve.)
• Indicate by drawing horizontal and vertical lines how you found the concentration of your unknowns.
Discussion:
• Did your results match your expectations? If not, why not?
• Did you have any difficulty finding the concentration of any of your unknowns?
• Do you think your measurement of protein concentration was accurate? Did your duplicates agree well? For your standards, did your absorbances increase as your protein concentrations increased?
Conclusion: as usual
Lab Report Rewrites
You may rewrite TWO of your first FIVE lab reports in an effort to improve your grade.
You do not need to rewrite the entire report; just fix the problems that caused you to lose points the first time around.
You MUST hand in the original version of your report along with your corrected version. If you do not have the original attached, we will not accept your rewrite.
Your final grade on the rewritten report will be ...
Micro chemlab
This document describes a laboratory experiment to determine the concentration of hydrogen peroxide in a commercial antiseptic solution through redox titration. Potassium permanganate is used as the titrant to oxidize hydrogen peroxide. By measuring the volume of permanganate needed to reach the endpoint of the reaction, the concentration of hydrogen peroxide can be calculated. The purpose is to verify if the 3% concentration listed on commercial products is accurate. The procedure involves titrating a sample of the hydrogen peroxide solution with a standard permanganate solution and recording the volumes used in multiple trials to calculate an average concentration.
Micro chem
This document describes a procedure to determine the concentration of hydrogen peroxide in a commercial antiseptic solution through redox titration. Potassium permanganate is used as the titrant to oxidize hydrogen peroxide. By measuring the volume of permanganate needed to reach the endpoint of the reaction, the concentration of hydrogen peroxide can be calculated. The purpose is to verify if the 3% concentration listed on commercial products is accurate. The procedure involves titrating a sample of the product against a standard solution of permanganate while monitoring the color change, and using the reaction stoichiometry and volumes to calculate the concentration.
Mr Exham's Guide to writing up a Biology Practical Investigation
This is a basic introduction as to what a good biological write-up should include. It may be helpful for coursework or your internal assessment
Calculations for Chemistry is pHun
This document provides instructions for students to complete pre-lab calculations to design a buffer solution for a chemistry lab experiment. It specifies that students must determine the acid/salt pair to use based on an assigned pH value between 1 and 8. It then outlines the calculations needed to determine the amounts of acid and salt to measure out, including molar concentrations and masses, using the dilution equation and Henderson-Hasselbalch formula. Students are reminded to show their work and have their calculations verified before starting the experiment.
China PH SOP
This document outlines standard operating procedures for pH testing of products produced in China for Gap Inc. brands. It details the responsibilities of various parties in the testing process including garment factories, laundries, Gap QA teams, and local labs. Key points covered include the pH testing process flow, required equipment and methods, responsibilities of different stakeholders, and differences between Gap protocols and China's national standards. The overarching goal is to ensure all China-produced products meet Gap's published pH standards regardless of brand or product type.
1472750387.pptx
The document summarizes a lab report on the effects of pH and concentration on enzyme activity. The introduction provides background on enzymes and their role in catalysis. Four experiments are described that test the effects of enzyme concentration, temperature, pH, and substrate concentration on the reaction rate of catalase. The results show that higher concentrations of enzyme and substrate as well as optimal pH levels increase reaction rate, while higher temperatures and enzyme inhibitors decrease activity. Overall, the objectives of determining how environmental factors influence reaction rates were met.
Oxidizing and Reducing Agents Lab Assignment - Virtual High School (VHS) - ...
The document describes an experiment to investigate how different solutions (acidic, neutral, basic) affect the reduction of manganese. Students are instructed to add a potassium permanganate solution to beakers containing acidic, neutral, and basic solutions of sodium hydrosulfite and observe the resulting reactions. They are asked to record initial and final pH measurements, concentrations of aqueous species, colors, and any solid materials produced. The results show that an acidic solution produces a pink color and manganese(II) ions, a neutral solution remains colorless and produces manganese dioxide, and a basic solution turns green and produces less manganese dioxide. Students are then asked to write a formal lab report following the proper scientific format and style to communicate
(CHE 276) Organic Chemistry Laboratory .docx
(CHE 276) Organic Chemistry Laboratory Lab References
Totah rev. 8/2011
5
The Laboratory Notebook
Your notebook will serve as a permanent record of your experimental work. It will contain the
information you need to complete your work efficiently and safely, and you will use the information
contained in your notebook to write laboratory reports explaining your results. For these reasons, it is
important that your notebook be complete and accurate. As a general rule, a good notebook is one from
which someone else can repeat your experimental work in the same way that you have done it.
I. General Guidelines:
1. Your notebook must be bound, the pages numbered, and have a carbon copy.
2. Write your name, the course name, and section # on the cover or front page.
3. Always use permanent ink, not pencil.
4. Write it down NOW. Your notebook is a log of what you do as you do it.
5. Use complete sentences.
6. Write everything in your notebook. Weights, temperatures, everything! When recording
experimental data, always include units.
7. Do not erase! If you make an error, draw a single line through it, and continue. The original
statement should still be legible.
8. Never remove original pages from your notebook. You may remove carbon copies.
9. Date every page as you use it.
10. Write legibly! If your notebook is illegible it will not be graded.
II. The Notebook:
Each experiment recorded in your notebook should contain the sections outlined below. A carbon
copy of your notebook pages will be collected at the end of each laboratory period and will graded as
a part of your lab report. Late notebook pages will not be accepted.
Sections A - E must be completed before you begin the experiment. This is the prelab. Your TA will
verify that this section is complete. You will not be allowed to proceed with the experiment if you
have not completed the prelab.
Section F, the Experimental, is recorded as you proceed each day.
Prelab: Completed before you arrive.
A. Title:
Give the experiment an accurate, descriptive title.
B. Purpose:
Discuss the general purpose of the experiment in two or three sentences. If the experiment is a
synthesis (as opposed to a technique), write the chemical equation, including reagents and
expected product(s). For multistep syntheses, write one equation for each transformation, including
the preparation of reagents.
(CHE 276) Organic Chemistry Laboratory The Laboratory Notebook
6
Totah rev. 8/2011
C. References:
Cite the reference upon which your experimental procedure is based. In most cases this will be
your laboratory manual and/or a supplemental handout. Also cite the source(s) of the information
found in the Chemical Properties & Safety table (part D).
D. Chemical Properties & Safety:
Make a table that lists the chemical properties of all reactants, reag.
(CHE 276) Organic Chemistry Laboratory .docx
(CHE 276) Organic Chemistry Laboratory Lab References
Totah rev. 8/2011
5
The Laboratory Notebook
Your notebook will serve as a permanent record of your experimental work. It will contain the
information you need to complete your work efficiently and safely, and you will use the information
contained in your notebook to write laboratory reports explaining your results. For these reasons, it is
important that your notebook be complete and accurate. As a general rule, a good notebook is one from
which someone else can repeat your experimental work in the same way that you have done it.
I. General Guidelines:
1. Your notebook must be bound, the pages numbered, and have a carbon copy.
2. Write your name, the course name, and section # on the cover or front page.
3. Always use permanent ink, not pencil.
4. Write it down NOW. Your notebook is a log of what you do as you do it.
5. Use complete sentences.
6. Write everything in your notebook. Weights, temperatures, everything! When recording
experimental data, always include units.
7. Do not erase! If you make an error, draw a single line through it, and continue. The original
statement should still be legible.
8. Never remove original pages from your notebook. You may remove carbon copies.
9. Date every page as you use it.
10. Write legibly! If your notebook is illegible it will not be graded.
II. The Notebook:
Each experiment recorded in your notebook should contain the sections outlined below. A carbon
copy of your notebook pages will be collected at the end of each laboratory period and will graded as
a part of your lab report. Late notebook pages will not be accepted.
Sections A - E must be completed before you begin the experiment. This is the prelab. Your TA will
verify that this section is complete. You will not be allowed to proceed with the experiment if you
have not completed the prelab.
Section F, the Experimental, is recorded as you proceed each day.
Prelab: Completed before you arrive.
A. Title:
Give the experiment an accurate, descriptive title.
B. Purpose:
Discuss the general purpose of the experiment in two or three sentences. If the experiment is a
synthesis (as opposed to a technique), write the chemical equation, including reagents and
expected product(s). For multistep syntheses, write one equation for each transformation, including
the preparation of reagents.
(CHE 276) Organic Chemistry Laboratory The Laboratory Notebook
6
Totah rev. 8/2011
C. References:
Cite the reference upon which your experimental procedure is based. In most cases this will be
your laboratory manual and/or a supplemental handout. Also cite the source(s) of the information
found in the Chemical Properties & Safety table (part D).
D. Chemical Properties & Safety:
Make a table that lists the chemical properties of all reactants, reag ...
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Final Applied Lab Project-BIOL 103The Effect of low pH on Enzyme A.docx
Final Applied Lab Project-BIOL 103The Effect of low pH on Enzyme A.docx
LamiaFinal data ( results).docx1- label all lanes, label ma.docx
LamiaFinal data ( results).docx1- label all lanes, label ma.docx
Mr Exham's Guide to writing up a Biology Practical Investigation
Mr Exham's Guide to writing up a Biology Practical Investigation
Oxidizing and Reducing Agents Lab Assignment - Virtual High School (VHS) - ...
Oxidizing and Reducing Agents Lab Assignment - Virtual High School (VHS) - ...
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In your essay you must consult at least 3 secondary sources and cite them both within and at the end of your essay in a proper referencing format.
The assignment should be 34 pages in length, double spaced and in Times New Roman font. You will be graded on your ability to recognise and explain both the strengths and weaknesses of the theory, write in a clear, purposeful and organised fashion and properly cite all references.
Issues Related to Energy Changes Assignment - Virtual High School (VHS) - SCH4U
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Equilibrium Assignment - Virtual High School (VHS) - SCH4U
1. The equilibrium constant for the reaction below is 0.18 at 25oC. PCl3(g) + Cl2(g) = PCl5(g)
The following concentrations were measured from the reaction vessel:
[PCl3(g)] = 0.0420
[Cl2(g)] = 0.0240
[PCl5(g)] = 0.00500
a. Is this system in equilibrium? Explain
b. If not, in which direction will the system shift?
2. Write the Solubility Product Constant (Ksp) expression for the following solution at 275 oC.
3. Given the solubility of MgF2(s) is 8.4 x 10-7 M, calculate the value of Ksp for the reaction shown in question #2 at 275 oC.
Corrosion Assignment - Virtual High School (VHS) - SCH4U
Corrosion Assignment
After reviewing the issues and opinions posted in the discussion forum by your
peers and receiving feedback from your teacher, write an opinion paper that will
show you have thoroughly researched and reflected on the issue you chose to
explore.
Be sure to include in your paper a discussion of how these substances are used
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All information and relevant data are to be included in a logically sequenced manner. In your writing, it is important to use appropriate writing style, tone, and scientific terminology. Conduct your research using reliable, peer reviewed and industry sources and ensure that sources listed in your reference list are directly related to information presented in your paper. Use the appropriate referencing style for science to cite your sources. For more information, see the page titled “References” in the Scientific Skills and Formatting module of the Introduction unit in your course.
Normal Distribution Assignment - Virtual High School (VHS) - MDM4U
2. In many situations, the normal distribution can be used to approximate the binomial distribution.
a. Explain the conditions in which this can be done, and explain why we might want to take advantage of this property.
b. Give an example of a situation in which we could do this.
c. Give an example of a situation in which we would not be able to make this approximation and explain why. 3. A species of alien has a mean height of 23 cm and a standard deviation of 3.6 cm. What is the probability that an alien chosen at random has a height of more than 20cm? 4. Researchers have observed that regular smokers have an average lifespan that is normally distributed and is 68 years with a standard deviation of 10 years. What percent of smokers will live beyond age 76? 5. The life span of a particular species of turtle are normally distributed with a mean of 180 years and a standard deviation of 40 years. What is the probability that one of these turtles will live more than a century? 6. A second species of alien has a mean height of 71 cm and a standard deviation of 5.3 cm. An alientologist discovers that 30% of them bump their heads getting into their spaceship. What is the height of the spaceship door? 7. In Bayfield, 65% of residents read the Bayfield Breeze, a local online blog. Dennis wants to know what people think of the blog, so he stops 40 people on the street to ask them if they read it. a. Verify that the normal distribution can be used to approximate this situation. b. What is the mean and standard deviation of the number of people he finds that read the Breeze? c. What is the probability that at least 25 of the people he asks read the blog? 8. Yuen Zhi is running a ring toss event at a school fair.
There is a 15% chance that each attempt wins a prize. She has 45 prizes and believes 250 people attempt the event. She is worried she won't have enough prizes. Can you reassure her she will probably be OK ? 9. We have been using the normal distribution to approximate situations that are in fact binomial
events. a. Demonstrate how accurate the approximation is by using both approaches to find the probability of the same event. b. Describe the conditions under which the normal would give a less accurate approximation. c. Explain a situation in which the criteria for using the approximation would be met, ie. np ≥ 5 and n(1 − p) ≥ 5, and yet you would decide not to use the normal distribution.
trp Operon - Virtual High School (VHS) - SBI4U
trp Operon
Recall
Cells respond to their environments by modifying gene expression.
Prokaryotic cells can individually adapt to their changing environments by
regulating the expression of their genes.
Bacteria can adjust to their environments using a special sequence of DNA
known as an operon, which controls the synthesis of protein in response to the environment. An operon has three key areas on the DNA strand: the promoter, the operator, and the transcription unit. The bacteria Escherichia coli need the amino acid tryptophan to survive. Amazingly, if tryptophan is not readily available in its environment, E. coli will actually make its own tryptophan from another compound by activating a metabolic pathway called the trp operon (trp for tryptophan). This metabolic process “shuts off’ as soon as tryptophan is readily available again. How the trp Operon Works Tryptophan is made using a sequence of five different enzymatic reactions. The genes that code for these five enzymes are clustered together on the same chromosome. A single promoter transcribes the entire cluster at once. In this way, the cell can turn “off” or “on” the entire series of functionally associated genes simultaneously. Let’s look at the molecules that cause these switches to be “on” or “off”. 1. How does gene regulation involving the trp repressor protein differ from what you observed with the lac repressor in the previous lesson? (2 points) 2. Based on your understanding of gene regulation in the cell and the function of the trp operon, describe how this process would be affected if there was a mutation in the operator region so that the operator could not carry out its function. (4 points) 3. What would be the result in this process of a genetic mutation that altered the shape of the trp repressor protein? (4 points)
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After reviewing the issues and opinions posted by your peers and receiving
feedback from your teacher, write an opinion paper that will show you have
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disorder/disease to use as an example.
Below are a couple of links to sites that may help you in organizing your opinion
paper. If you have any questions, please contact your teacher.
Resources:
Writing a Science Paper
Writing an Opinion Essay
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All information and relevant data are to be included in a logically sequenced
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Intersections Unit Assignment - Virtual High School (VHS) - MCV4U
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Answer all questions with full solutions. Make sure your work is legible, even after you have scanned iT, and submit it as 0 single file.
1. The equation of a line can be determined using two points on the line.
a. Find the vector, parametricand symmetric equations of the line through the points
(-2,6,1)and(2,1,3)
b. Explain the features of the equations ofa line that is parallel to the xy plane, but does not lie on the plane, and is not parallel to any of the axes. include a Lan Graph of your line.
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e
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إضغ بين إيديكم من أقوى الملازم التي صممتها
ملزمة تشريح الجهاز الهيكلي (نظري 3)
💀💀💀💀💀💀💀💀💀💀
تتميز هذهِ الملزمة بعِدة مُميزات :
1- مُترجمة ترجمة تُناسب جميع المستويات
2- تحتوي على 78 رسم توضيحي لكل كلمة موجودة بالملزمة (لكل كلمة !!!!)
#فهم_ماكو_درخ
3- دقة الكتابة والصور عالية جداً جداً جداً
4- هُنالك بعض المعلومات تم توضيحها بشكل تفصيلي جداً (تُعتبر لدى الطالب أو الطالبة بإنها معلومات مُبهمة ومع ذلك تم توضيح هذهِ المعلومات المُبهمة بشكل تفصيلي جداً
5- الملزمة تشرح نفسها ب نفسها بس تكلك تعال اقراني
6- تحتوي الملزمة في اول سلايد على خارطة تتضمن جميع تفرُعات معلومات الجهاز الهيكلي المذكورة في هذهِ الملزمة
واخيراً هذهِ الملزمة حلالٌ عليكم وإتمنى منكم إن تدعولي بالخير والصحة والعافية فقط
كل التوفيق زملائي وزميلاتي ، زميلكم محمد الذهبي 💊💊
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Answers are given for all the puzzles and problems.)
With Metta,
Bro. Oh Teik Bin 🙏🤓🤔🥰
HYPERTENSION - SLIDE SHARE PRESENTATION.
IT WILL BE HELPFULL FOR THE NUSING STUDENTS
IT FOCUSED ON MEDICAL MANAGEMENT AND NURSING MANAGEMENT.
HIGHLIGHTS ON HEALTH EDUCATION.
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Acid Base Titration Lab Assignment - SCH4U h5 - Chemistry, 12, University- VHS
- 1. PanHelp SCH4U h5, Chemistry, 12, University Virtual High School Unit Assignment: Acid-Base Titration Lab Assignment Assignment Help | 100% Plagiarism Free | Success Assured | Email Now to get quote – admin@panhelp.com
- 2. Assignment Help | 100% Plagiarism Free | Success Assured | Email Now to get quote – admin@panhelp.com Purpose: To determine the molar concentration of a base by performing a titration using an acid of known volume and concentration. Procedure 1. For each acidbase system to be tested, create a data table that includes the volume of acid in the Erlenmeyer flask, the final buret reading, the initial buret reading, the volume of base used in titration in the first column. 2. Select the Type of Reaction (i.e. strong acid vs strong base). 3. Choose to fill the burette with a base. 4. Select the species of acid and base to be used in the lab. Lab Report Acid Base Titration Theory: The unknown concentration of the acid/base can be found out by titrating it with the base/acid of the known concentration. Preferably the base is filled with the burette, since acid cause burns if mis handled. Materials Needed: • 25ml of 0.2056M hydrochloric acid • 50ml of sodium hydroxide (any concentration) • 25ml of 0.1242M acetic acid • 50ml of potassium hydroxide (any concentration) • 10ml Phenolphthalein which will act as an indicator, this is an important material which helps to identify the end of titration by changing one of its properties like colour • Burette, to hold the base • Flask , for acid
- 3. Assignment Help | 100% Plagiarism Free | Success Assured | Email Now to get quote – admin@panhelp.com 5. Select the indicator to be used. If you are unsure which indicator to use, research the uses of both methyl orange and phenolphthalein to help you decide. 6. Record the molar concentration and volume of acid in the Erlenmeyer flask. 7. For larger amounts, use the slider to add base from the buret to the Erlenmeyer flask. As you approach the endpoint, the solution will show a brief colour change to pink that will disappear. This is the point at which you can change to adding base drop wise using the button below the slider. 8. Record the volume of based used to titrate the sample of acid to the endpoint. 9. Repeat steps # 2 8 using a weak acid vs. a strong base Procedure: 1. For each acid-base system to be tested, create a data table that includes the volume of acid in the Erlenmeyer flask, the final burette reading, the initial burette reading, the volume of base used in titration in the first column. 2. Select the Type of Reaction (i.e. strong acid vs strong base). 3. Choose to fill the burette with a base. 4. Select the species of acid and base to be used in the lab. 5. Select the indicator to be used. If you are unsure which indicator to use, research the uses of both methyl orange and phenolphthalein to help you decide. 6. Record the molar concentration and volume of acid in the Erlenmeyer flask. 7. For larger amounts, use the slider to add base from the burette to the Erlenmeyer flask. As you approach the endpoint, the solution will show a brief colour change to pink that will disappear. This is the point at which you can change to adding base drop wise using the button below the slider. 8. Record the volume of based used to titrate the sample of acid to the endpoint. 9. Repeat steps # 2 - 8 using a weak acid vs. a strong base.
- 4. Assignment Help | 100% Plagiarism Free | Success Assured | Email Now to get quote – admin@panhelp.com Communicate the results in a lab report. Refer to the "Writing a Lab Report" page of the Scientific Skills and Formatting module to ensure that you follow the proper format. Be sure to include your calculations for determining the molar concentration of both the strong and weak acids used in the titration. Also discuss any comparisons you can make between the two types of systems. . Please contact to get complete assignment - admin@panhelp.com
- 5. Assignment Help | 100% Plagiarism Free | Success Assured | Email Now to get quote – admin@panhelp.com Note on Writing In Science All information and relevant data are to be included in a logically sequenced manner. In your writing, it is important to use appropriate writing style, tone, and scientific terminology. Conduct your research using reliable, peer revewied and industry sources and ensure that sources listed in your reference list are directly related to information presented in your paper. Use the appropriate referencing style for science to cite your sources. For more information, see the page titled “References” in the Scientific Skills and Formatting module of the Introduction unit in your course . Please contact to get complete assignment - admin@panhelp.com