NOTES: Experiment 1: Synthesis of Aspirin 150ml flask#1: 88.000g Added 3.0g sali

Question

NOTES:

Experiment 1: Synthesis of Aspirin

150ml flask#1: 88.000g

Added 3.0g salicylic acid to flask#1: TV=91.000g

Added 25ml of acetic anhydride to flask#1: TV=118.000g

Added 2ml of sulfuric acid to flask#1: TV=121.046g

Set bath to water 100C and put flask#1 in for 2 minutes

TV in flask#1=29.1ml

Added 15ml of water to flask#1: TV=44.1ml

Set bath to Ice(0C) and put flask#1 in for 3 minutes:TV=44.1ml; 136.046g

Decanted solution from flask#1 into empty flask#2 to isolate crystals: TV for flask#1=2.8ml(crystalized); (TV for flask#2=41.3ml, TV with flask#2 on balance=132.233g)

TV of crystalized aspirin+flask#1=91.813g

Experiment 2: Test for Salicyclic Acid

Added 0.1g of pure acetylsalicylic acid to test tube#1

Added 0.1g of salicylic acid to test tube #2

Added crystals from Experiment #1 to test tube #3

Added 8ml of 0.2 M iron(lll) chloride to test tubes#1-4

Test tubes 1,3, and 4 are a yellowish color(acetylsalicylic acid is an ester and does NOT react with Iron(lll)chloride)

Test tube #2 brownish red color(salicylic acid is a phenol and reacts w/Iron(lll) chloride)

Flask #3 contains the crystals and 8ml of 0.2 M Iron(lll) Chloride, YES this is a pure acetylsalicylic acid aspirin

Synthesis of Aspirin Assignment

General Concepts

What byproduct is synthesized along with aspirin in the reaction performed in this lab?

Experiment-Specific Questions

Experiment I: Synthesis of Aspirin

Fill in the table with the results from your lab notes and complete the necessary calculation:

Calculate the percent yield using the formula below:
% Yield = [g aspirin obtained/ g aspirin calculated (3.91)] X 100

Explain what could cause a less than 100% yield.

Experiment II: Test for Salicylic Acid

What is indicated by iron(III) chloride changing color?

Fill in the table with the results from your lab notes:

Based on the color of your synthesized aspirin how pure was it?

Are my answers correct?

Explanation / Answer

Following part needs correction

The byproduct that is synthesized along with aspirin is Acetic Acid

Here, salicylic acid and acetic anhydride are reactants which react with each other to form aspirin and acetic acid as byproduct

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