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Which condition is changed in experiment 2?
Chemistry 5070 · O Level · Rate of reaction
Rate of reaction — practice question
A student puts the catalyst manganese(IV) oxide into aqueous hydrogen peroxide, and the hydrogen peroxide breaks down: $\text{2H}_2\text{O}_2(aq) \rightarrow \text{2H}_2\text{O}(l) + \text{O}_2(g)$. The student then measures the volume of oxygen released at regular time intervals. This is experiment 1. The student carries out experiment 2 again, but with one altered condition. Graphs for experiments 1 and 2 are shown.