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Learning objective

Explain reactions of acyl chlorides and acid anhydrides.

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Topic

Carboxylic acids and derivatives (A-level only)

Subtopic

Carboxylic acids, esters and acyl derivatives (A-level only)

Aqa A Level ChemistryOrganic chemistry

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Quick explanation

Explain reactions of acyl chlorides and acid anhydrides

  • This point belongs to Carboxylic acids and derivatives (A-level only), especially Carboxylic acids, esters and acyl derivatives (A-level only).
  • You need to be able to explain reactions of acyl chlorides and acid anhydrides.
  • The key ideas to know are acyl chloride and acid anhydride.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

acyl chlorideacid anhydride

Why it matters

This objective helps connect Carboxylic acids, esters and acyl derivatives (A-level only) to exam-style questions, flashcards, and revision notes for Carboxylic acids and derivatives (A-level only).

Quick student answer

Which of the following reactions occurs when acyl chloride reacts with water?

Direct answer

A) Formation of a carboxylic acid and hydrochloric acid

Key terms

  • Acyl chloride: A compound derived from a carboxylic acid where the hydroxyl group is replaced by a chlorine atom.
  • Esterification: The chemical reaction that forms an ester from an alcohol and a carboxylic acid or acyl chloride.

Common trap

Confusing acyl chlorides with carboxylic acids: Remember that acyl chlorides are more reactive than carboxylic acids due to the presence of the chlorine atom, which is a good leaving group.

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