DP Chemistry (last assessment 2024)

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Question 22M.2.sl.TZ2.3c(ii)

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Date May 2022 Marks available [Maximum mark: 2] Reference code 22M.2.sl.TZ2.3c(ii)
Level sl Paper 2 Time zone TZ2
Command term State Question number c(ii) Adapted from N/A
c(ii).
[Maximum mark: 2]
22M.2.sl.TZ2.3c(ii)

Sulfur trioxide is produced from sulfur dioxide.

2SO2 (g) + O2 (g) ⇌ 2SO3 (g)          ΔH = −196 kJ mol−1

(c(ii))

State the meaning of a strong Brønsted–Lowry acid.

[2]

Markscheme

fully ionizes/dissociates ✔

proton/H+ «donor » ✔

Examiners report

While a straightforward question, many candidates only answered part of the question - either focussing on the “strong” or on the “Brønsted-Lowry acid”. The average mark on this question was 1.2 out of 2 marks.

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