Purchase Solution

Excess of acetic anhydride

Not what you're looking for?

Ask Custom Question

What do they mean by using 55.0% excess of acetic anhydride?

Purchase this Solution

Solution Summary

55.0% excess of acetic anhydride is explained using various equation examples.

Solution Preview

Stoichiometry Problem with Aspirin: Mole/Mole and Percent Yield

Aspirin, C9H8O4, is prepared by reacting salicylic acid, C7H6O3, with acetic anhydride C4H6O3.

C7H6O3 + C4H6O3 -----> C9H8O4 + C2H4O2

Prepare 45.0g of aspirin. Use 55.0% excess of acetic anhydride and expect 85% yield in the reaction. How many grams of each reactant should we use?

Solution: We need to work backwards from 45.0 grams of aspirin. We'll convert 45.0 g into moles ...

Purchase this Solution

Free BrainMass Quizzes
Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.


The quiz helps in revising basic concepts about thermochemistry.

General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.