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Submit Lab #8 (Lab Report) for Aspirin Synthesis Level 1 and 2

Open Posted By: highheaven1 Date: 22/04/2021 Graduate Assignment Writing

 

http://www.rsc.org/learn-chemistry/resources/screen-experiment/

 Not really sure how the LAB REPORT is supposed to be done but if need additional info i will try and provide. Hopefully the worksheets can help out more and the link is for the lab. 

Category: Engineering & Sciences Subjects: Chemistry Deadline: 12 Hours Budget: $120 - $180 Pages: 2-3 Pages (Short Assignment)

Attachment 1

Synthesis of Aspirin (Level 1)

Recrystallization and Analysis of Aspirin (Level 2)

The Lab Report

THE LABORATORY REPORT

Lab reports for synthesis have a set format. This type of report refers to experiments whose main goal is to prepare a pure substance from specific starting materials involving a chemical transformation or reaction. Generally, this product is isolated, purified, and characterized. The general format suggested for lab reports is given below.  

Title of experiment, including your name and date

Chemical Equation(s)

Table of physical constants

Introduction

Experiment procedure/outline

Data and Results

Conclusion

Reaction Mechanism, if necessary

References

Lab reports submitted for grading must be typed and submitted electronically. Grammar and spelling will be graded. Write in complete sentences and use a dictionary (or spell-check) to check your spelling. Overdue lab reports will be subject to a 20% penalty. 

Introduction: Specify the primary objective and describe the theoretical background and information regarding the experiment including reaction types, techniques and instrumentation used for analysis. List applications or uses of the main compound produced in the experiment. Cite your primary references in this section. If it serves an illustrative purpose, the introduction can also include a diagram or sketch of the setup used.

Title, Including your name and the date the lab was performed:

Chemical Equation: Write a chemical equation for the reaction.

Table of Physical Constants: Include a Table of Physical Constants for all reagents and solvents used in the experiment. Include the following: Compound names, formulas or structures, MW (g/mol), mp. (C), bp. (C), density,  (g/mL), Characteristics & solubilities, and other data if it is relevant to a particular experiment.

Compound Molecular Formula MW (g/mol) m.p. (oC) b.p. (oC) Density (g/mL) Volume (mL) Mass (g) n (moles)
2-Hydroxybenzoic acid (salicylic acid) C7H6O3 138         5.00 0.0362
Ethanoic Anhydride (ethanoic anhydride) C4H6O3 102         18.0 0.1765
Sulfuric acid H2SO4              
Water H2O              
Aspirin

The Lab

Format

Incorrect... “We heated the sample...” (don’t use pronouns)

Incorrect... “Heat the sample...” (don't use an imperative form of the verb)

Correct... “The sample was heated...” (write in the past tense)

Incorrect.. “We mixed a 25 mL portion with...” Incorrect.. “Mix a 25 mL portion with..” Correct... “A 25 mL portion was mixed with...”

Procedure: A summary (or concise outline) of the steps taken including the weight of the starting materials. If a volume is employed, convert the volume to the mass and place in brackets.

Example: salicylic acid (1.0g, 0.0072 mol) was added to acetic anhydride (3.0 mL, 3.24g) and 3 drops of 85% phosphoric acid in a round bottom flask.

Whenever it is necessary to describe procedures that were followed, write in the “past passive” tense and not the present tense. Do not use pronouns and do not write in the “imperative”, i.e., no commands.

Example: The reaction flask was swirled in order to mix the 3 solutions together. The mixture was placed in a reaction station with a magnetic stirrer for 15 minutes at 50-60C in order to mix completely. 10mL of water was added to the reaction tube and the tube placed in an ice-water bath (about 5 minutes) until crystallization occurred. The crude aspirin was then collected by vacuum filtration using a Büchner funnel.

Results: All pertinent information should be shown here. Examples such as sample weights, volumes, factors, m.p., b.p., theoretical) as well as % yield should be shown. Graphs and/or Figures are inserted in this section as well. When reporting several values of similar data, use tables. Note that in tables, units are written only once at the top of each column or to the left of each row in the table. If required, a sample calculation should be included in this section.  

Mechanism: If necessary, show the reaction mechanism by using curved arrows notation and state the type of reaction, e.g., reduction, oxidation, elimination, substitution etc. Give reasons for reactions conditions, e.g., catalysts, heating, vacuum, reflux, etc.

Conclusion: Discuss the accuracy of your experimental results and comment on the significance of the results. If necessary, Interpret infrared spectroscopic and other data of the product prepared. Give the reasons for using specific techniques, e.g., distillation, extraction, etc.  

References: Include a bibliography of literature sources used. The internet can be used as a search engine to locate primary sources. References should be presented in American Chemical Society format. The first time a particular literature source is cited in the text (hopefully in the Introduction section), it should be assigned a number and placed in the list of references at the end of the paper. Example of a reference listings is provided below for a book [1], a chapter in a book [2] and a paper [3].

 1. B. Wunderlich, Macromolecular Physics, Vol.2, Academic Press, New York, 1976.

2. B. Wunderlich, Macromolecular Physics: crystal nucleation and growth, Vol.2, pp 717-734, Academic Press, New York, 1976.

3. T. Subbiah, G.S. Bhat, R.W. Tock, S. Parameswaran, S. Ramkumar. Electrospinning of Nanofibers, J. Applied Polymer Science, Vol. 96 (2005) pp 557-569

Attachment 2

Synthesis of Aspirin (Level 1)

Recrystallization and Analysis of Aspirin (Level 2)

The Lab Report

THE LABORATORY REPORT

Lab reports for synthesis have a set format. This type of report refers to experiments whose main

goal is to prepare a pure substance from specific starting materials involving a chemical

transformation or reaction. Generally, this product is isolated, purified, and characterized. The

general format suggested for lab reports is given below.

1. Title of experiment, including your name and date

2. Chemical Equation(s)

3. Table of physical constants

4. Introduction

5. Experiment procedure/outline

6. Data and Results

7. Conclusion

8. Reaction Mechanism, if necessary

9. References

Lab reports submitted for grading must be typed and submitted electronically. Grammar and spelling will be graded. Write in complete

sentences and use a dictionary (or spell-check) to check your spelling. Overdue lab reports will be subject to a 20% penalty.

4. Introduction: Specify the primary objective and describe the theoretical background and information regarding

the experiment including reaction types, techniques and instrumentation used for analysis. List applications or

uses of the main compound produced in the experiment. Cite your primary references in this section. If it serves

an illustrative purpose, the introduction can also include a diagram or sketch of the setup used.

1. Title, Including your name and the date the lab was performed:

2. Chemical Equation: Write a chemical equation for the reaction.

3. Table of Physical Constants: Include a Table of Physical Constants for all reagents and solvents used in the

experiment. Include the following: Compound names, formulas or structures, MW (g/mol), mp. (C), bp. (C),

density,  (g/mL), Characteristics & solubilities, and other data if it is relevant to a particular experiment.

Compound Molecular Formula

MW (g/mol)

m.p. (oC) b.p. (oC) Density (g/mL)

Volume (mL)

Mass (g) n (moles)

2-Hydroxybenzoic acid (salicylic acid)

C7H6O3 138 5.00 0.0362

Ethanoic Anhydride (ethanoic anhydride)

C4H6O3 102 18.0 0.1765

Sulfuric acid H2SO4 Water H2O

Aspirin

The Lab

Format

Incorrect... “We heated the sample...” (don’t use pronouns)

Incorrect... “Heat the sample...” (don't use an imperative form of the verb)

Correct... “The sample was heated...” (write in the past tense)

Incorrect.. “We mixed a 25 mL portion with...”

Incorrect.. “Mix a 25 mL portion with..”

Correct... “A 25 mL portion was mixed with...”

5. Procedure: A summary (or concise outline) of the steps taken including the weight of the starting materials. If a

volume is employed, convert the volume to the mass and place in brackets.

Example: salicylic acid (1.0g, 0.0072 mol) was added to acetic anhydride (3.0 mL, 3.24g) and 3 drops of 85% phosphoric

acid in a round bottom flask.

Whenever it is necessary to describe procedures that were followed, write in the “past passive” tense and not the present

tense. Do not use pronouns and do not write in the “imperative”, i.e., no commands.

Example: The reaction flask was swirled in order to mix the 3 solutions together. The mixture was placed in a reaction station

with a magnetic stirrer for 15 minutes at 50-60C in order to mix completely. 10mL of water was added to the reaction tube

and the tube placed in an ice-water bath (about 5 minutes) until crystallization occurred. The crude aspirin was then

collected by vacuum filtration using a Büchner funnel.

6. Results: All pertinent information should be shown here. Examples such as sample weights, volumes, factors, m.p.,

b.p., theoretical) as well as % yield should be shown. Graphs and/or Figures are inserted in this section as well. When

reporting several values of similar data, use tables. Note that in tables, units are written only once at the top of each

column or to the left of each row in the table. If required, a sample calculation should be included in this section.

7. Mechanism: If necessary, show the reaction mechanism by using curved arrows notation and state the type of

reaction, e.g., reduction, oxidation, elimination, substitution etc. Give reasons for reactions conditions, e.g.,

catalysts, heating, vacuum, reflux, etc.

8. Conclusion: Discuss the accuracy of your experimental results and comment on the significance of the results.

If necessary, Interpret infrared spectroscopic and other data of the product prepared. Give the reasons for using

specific techniques, e.g., distillation, extraction, etc.

9. References: Include a bibliography of literature sources used. The internet can be used as a search engine to

locate primary sources. References should be presented in American Chemical Society format. The first time a

particular literature source is cited in the text (hopefully in the Introduction section), it should be assigned a

number and placed in the list of references at the end of the paper. Example of a reference listings is provided

below for a book [1], a chapter in a book [2] and a paper [3].

1. B. Wunderlich, Macromolecular Physics, Vol.2, Academic Press, New York, 1976.

2. B. Wunderlich, Macromolecular Physics: crystal nucleation and growth, Vol.2, pp 717-734, Academic Press, New York, 1976.

3. T. Subbiah, G.S. Bhat, R.W. Tock, S. Parameswaran, S. Ramkumar. Electrospinning of Nanofibers, J. Applied Polymer Science, Vol. 96

(2005) pp 557-569