SPM 2010 - Rate of reaction

Three experiments, I, II and III are carried out to investigate the factors affecting the rate of reaction. Table below shows the reactants and the conditions of reaction involved.

Diagram below shows the results of experiments I, II and III.

Based on the graph,

(i)   compare the rate of reaction between experiment I and experiment II.

       Explain your answer using the Collision Theory.                                                                                    [5]

(ii)  suggest one way to obtain curve III without changing the zinc, acid or temperature in experiment II.

       Explain your answer using the Collision Theory.                                                                                    [5]

Answer:

(i)

(ii)