A-LevelChemistryReaction kinetics9701/12 · May/June 2014 · Q51 Mark

In the diagram, curve X was obtained by observing the decomposition of 100 cm³ of 1.0 mol dm⁻³ hydrogen peroxide, catalysed by manganese(IV) oxide. [Figure 5.1] Which alteration to the original experimental conditions would produce curve Y?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Aadding more manganese(IV) oxide

Badding some 0.1 mol dm⁻³ hydrogen peroxide

Cadding water

Draising the temperature

✓ Correct answer

B: adding some 0.1 mol dm⁻³ hydrogen peroxide

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Topic: Reaction kinetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2014 Paper 1 Variant 2, question 5.

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