DP Chemistry (first assessment 2025)

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Question 19N.2.SL.TZ0.4a(ii)

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.2.SL.TZ0.4a(ii)
Level SL Paper 2 Time zone TZ0
Command term Justify, State Question number a(ii) Adapted from N/A
a(ii).
[Maximum mark: 1]
19N.2.SL.TZ0.4a(ii)
(a(ii))

The value of Ka at 298 K for the first dissociation is 5.01 × 10−4.

State, giving a reason, the strength of citric acid.

[1]

Markscheme

weak acid AND partially dissociated
OR
weak acid AND equilibrium lies to left
OR
weak acid AND Ka < 1 ✔

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