Explore BrainMass

Pre lab questions

2. Why is a large excess of acetic acid used in the preparation of isopentyl acetate?

3. Concentrated sulfuric acid is used as a catalyst for the esterification of acetic acid in the preparation of isopentyl acetate. Why is sulfuric acid needed if another acid, acetic acid, is already present?

4. Fatty acids are long-chain carboxylic acids, usually of 12 or more carbon atoms, isolated from saponification of fats and oils (esters of glycerol). Draw the structure of the two fatty acids named below and also determine their common name.

1. Hexadecanoic acid
2. Octadecanoic acid

5. Gas chromatographic analysis of a mixture of organic compounds gave the following peak areas (sq cm): Hexane=2.7: heptane= 1.6; hexanol= 1.8; toluene=0.5.

a. Calculate the mole percent composition of the mixture. Assume that the response of the detector (area per mole) is the same for each component.

b. Calculate the weight percent composition of the mixture, using the same assumptions as in part a.

Solution Summary

Pre lab question for organic chemistry explaining esterification, using excess of reagents, gas chromatographic analysis, percent yield