CAIE A Level Chemistry 9701 · Carboxylic acids and derivatives
A student prepares ethyl ethanoate by heating ethanol with ethanoic acid in the presence of concentrated sulfuric acid. Two separate samples of the ester are then hydrolysed. Sample A is heated with dilute hydrochloric acid. Sample B is heated with dilute sodium hydroxide. Explain the differences in the products formed in the two hydrolysis reactions.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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