Laboratory Techniques in Organic Chemistry
Laboratory Techniques in Organic Chemistry
4th Edition
ISBN: 9781464134227
Author: Jerry R. Mohrig, David Alberg, Gretchen Hofmeister, Paul F. Schatz, Christina Noring Hammond
Publisher: W. H. Freeman
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Chapter 3, Problem 3Q
Interpretation Introduction

Interpretation:

The theoretical yield and the percent yield of acetylsalicylic acid needs to be calculated.

Concept Introduction:

A limiting reactant limits the amount of product formed in the reaction. The theoretical yield is the amount of product formed from limiting reactant. The percent yield can be calculated from theoretical yield and actual yield as follows:

  %Yield=Theoretical yieldActual yield×100%

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If you were to use 6.00 g salicylic acid and an excess of acetic anhydride in the synthesis of aspirin, what would be the theoretical yield of acetylsalicylic acid in moles? In grams? Show your solution.
2.5 grams of methyl orange was synthesized by using sulfanilic acid dihydrate, 3 g of anhydrous Na2CO3, 3.5 g of NaNO2, 12 mL of HCl and 6 mL of N,N-dimethylaniline and other necessary chemicals. Write down all the reaction steps and calculate the % yield of methyl orange synthesized
Q. In a chemical reaction 2.05 g of salicylic acid was reacted with 5.0 mL of acetic anhydride in presence of a catalytic amount (6 drops) of 85% phosphoric acid. What would be the theoretical yield of Aspirin?

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Laboratory Techniques in Organic Chemistry

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