CAPE Chemistry Unit 1 · 2013 · Paper 2 · Question 5(b)(i)

The values of initial rates measured for the reaction S₂O₃²⁻ + 2I⁻ → 2SO₄²⁻ + I₂ are recorded in Table 3.

Use the information from the table to deduce the rate equation and calculate the overall order of the reaction.

This question uses a figure or table from the paper — you'll see it when you practise.