CAIE A Level Chemistry 9701 · Nitrogen compounds

Nitrogen compounds: compare question

Compare7 marksChallenge

A student proposes two routes to obtain ethylamine and diethylamine from ethanamide.

Route 1: treat ethanamide with lithium aluminium hydride in dry ether.

Route 2: treat ethanamide with lithium aluminium hydride in dry ether, then react the product with an excess of chloroethane in ethanol in a sealed tube.

Compare the two routes. In your answer, identify the product of each step, state the conditions needed, and explain why Route 2 gives a secondary amine rather than a primary amine.

0 words · 7 marks

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How this question is marked

7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.

Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.

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