WJEC A Level Chemistry
WJEC A Level Chemistry 4.5 Carboxylic Acids and Derivatives Exam Questions
Free WJEC A Level Chemistry exam questions on 4.5 Carboxylic Acids and Derivatives, with mark schemes. Covers carboxylic acids, esters, acyl chlorides, amides and their reactions.
4.5 Carboxylic Acids and Derivatives exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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WJEC A Level Chemistry Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About WJEC A Level Chemistry 4.5 Carboxylic Acids and Derivatives
This topic covers acid derivatives and their reactions.
What you need to know
- Carboxylic acids Acidity, reactions with bases and carbonates, and esterification.
- Esters Hydrolysis in acid and alkali; uses in flavourings.
- Acyl chlorides React readily with water, alcohols, ammonia and amines.
- Amides Formed from acyl chlorides and ammonia or amines.
Common mistakes in 4.5 Carboxylic Acids and Derivatives
- Saying alkaline ester hydrolysis is reversible.
- Forgetting HCl is produced with acyl chlorides.
- Confusing amides with amines.
Try three 4.5 Carboxylic Acids and Derivatives exam-style questions
1. State why acyl chlorides are more reactive than carboxylic acids. (1 mark)
Show the mark scheme answer
The carbonyl carbon is more electron-deficient due to the electronegative chlorine.
2. Name the products of alkaline hydrolysis of ethyl ethanoate. (2 marks)
Show the mark scheme answer
Sodium ethanoate (1) and ethanol (1).
3. Write the product of ethanoyl chloride with ammonia. (1 mark)
Show the mark scheme answer
Ethanamide.
4.5 Carboxylic Acids and Derivatives FAQs
What does Carboxylic Acids and Derivatives cover?
Carboxylic acids, esters, acyl chlorides and amides.
Which practical links here?
Preparing an ester and purifying it.
What is saponification?
Alkaline hydrolysis of fats to make soap.
Revise this topic with flashcards: WJEC A Level Chemistry Flashcards, with mark scheme answers for Anki and Quizlet.
