DP Chemistry (last assessment 2024)

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Question 20N.3.sl.TZ0.11a

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.3.sl.TZ0.11a
Level sl Paper 3 Time zone TZ0
Command term Deduce Question number a Adapted from N/A
a.
[Maximum mark: 1]
20N.3.sl.TZ0.11a

Aspirin is formed by reacting salicylic acid with ethanoic anhydride. The structure of aspirin is given in section 37 of the data booklet.

(a)

Deduce the structural formula of the by-product of this reaction.

[1]

Markscheme

OR

CH3COOH ✔


Accept full OR condensed structural formula.

Examiners report

A well answered question. Most candidates chose to enter the full structure. Some incorrect answers gave the aspirin product or the salicylic acid rather than the acetic acid.

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