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Esterification

AQA A-level ChemistryCarboxylic Acids and DerivativesLesson 5 of 16

A carboxylic acid reacts with an alcohol to form an ester and water. This is esterification. The mixture is warmed with a strong acid catalyst, usually a few drops of concentrated sulfuric acid.

RCOOH + R′OH ⇌ RCOOR′ + H2O

Example: ethanoic acid and ethanol form ethyl ethanoate:

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