(a) Chlorine dioxide undergoes the following reaction in aqueous solution.
2ClO₂ + 2OH⁻ → ClO₂⁻ + ClO₃⁻ + H₂O
The initial rate of the reaction was measured at different initial concentrations of ClO₂ and OH⁻. The table shows the results obtained.
[Table with columns: 'experiment', '[ClO₂] /mol dm⁻³', '[OH⁻] /mol dm⁻³', 'initial rate /mol dm⁻³ s⁻¹' and rows for experiments 1, 2, 3 with data values]

Q: What topic does this question test?

This question tests Reaction kinetics in A-Level Chemistry (syllabus code 9701). It is worth 18 marks.

Q: Which exam paper is this question from?

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2017 examination, Paper 4 Variant 2 (9701_m17_qp_42.pdf).

Question

(a) Chlorine dioxide undergoes the following reaction in aqueous solution.
2ClO₂ + 2OH⁻ → ClO₂⁻ + ClO₃⁻ + H₂O
The initial rate of the reaction was measured at different initial concentrations of ClO₂ and OH⁻. The table shows the results obtained.
[Table with columns: 'experiment', '[ClO₂] /mol dm⁻³', '[OH⁻] /mol dm⁻³', 'initial rate /mol dm⁻³ s⁻¹' and rows for experiments 1, 2, 3 with data values]

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