(a) A scientist investigated the hydrolysis of starch. He added amylase to a suspension of starch and measured the concentration of maltose in the reaction mixture at regular intervals. His results are shown in the graph below. 300- 250 200 Concentration of maltose/ 150 mg dm-3 100 50 10 15 20 25 30 Time/minutes Determine the rate of the reaction at 10 minutes. Show how you obtained your answer. Rate of reaction mg dm min (b) Explain the results shown in the graph.

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