DP Chemistry (last assessment 2024)

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Question 19N.3.sl.TZ0.9d(ii)

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.3.sl.TZ0.9d(ii)
Level sl Paper 3 Time zone TZ0
Command term Identify Question number d(ii) Adapted from N/A
d(ii).
[Maximum mark: 1]
19N.3.sl.TZ0.9d(ii)

Stearic acid (Mr = 284.47) and oleic acid (Mr = 282.46) have the same number of carbon atoms. The structures of both lipids are shown in section 34 of the data booklet.

(d(ii))

Identify a reagent that hydrolyses triglycerides.

[1]

Markscheme

«concentrated» NaOH (aq)/sodium hydroxide
OR
«concentrated» HCl (aq)/hydrochloric acid
OR
enzymes/lipases ✔

NOTE: Accept other strong acids or bases.

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