DP Chemistry (last assessment 2024)

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Question 20N.2.hl.TZ0.c(ii)

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.2.hl.TZ0.c(ii)
Level hl Paper 2 Time zone TZ0
Command term State Question number c(ii) Adapted from N/A
c(ii).
[Maximum mark: 1]
20N.2.hl.TZ0.c(ii)

Chlorine undergoes many reactions.

Chlorine gas reacts with water to produce hypochlorous acid and hydrochloric acid.

Cl2 (g)+H2O (l)⇌HClO (aq)+HCl (aq)

State the formula of the conjugate base of hypochlorous acid.

[1]

Markscheme

ClO- ✔

Examiners report

Roughly ⅓ of the candidates failed to identify the conjugate base, perhaps distracted by the fact it was not contained in the equation given.

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