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Separate Chemistry · Paper 2 · Foundation + Higher · C7

Esters and ethyl ethanoate

Key ideas1 of 3

Joining an acid and an alcohol

A carboxylic acid reacts with an alcohol to make an ester and water. This is a condensation reaction because a small molecule is produced when the organic molecules join. The mixture is warmed with an acid catalyst, commonly concentrated sulfuric acid, in a supervised laboratory. The reaction is reversible, so a reacting mixture may contain some original acid and alcohol as well as products.

Two condensed reactants labelled P and Q and a product structure.

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Practice, downloads and sources

Daily 5 · Exam practice · Revision sheet ↓

Foundation + Higher · C7. Use alongside the shared C7 lessons.

AQA GCSE Chemistry 8462 · 4.7.2.4. Original notes, questions and diagrams. Models are simplified; teaching data are illustrative.