When iodine is added to an acidic solution of aceton, its purple color disappear

Question

When iodine is added to an acidic solution of aceton, its purple color disappears indicating that the iodine has been used up. The reaction is determined to be zero order with respect to the iodine. A solution was made up in the following way: 20mL 4M acetone+10mL 1.0M H^+ +10mL 0.0050M I2 + 10mL H2O. It took 250 seconds for the iodine color to disappear from that solution. A second reaction mixture was prepared at the same temperature in the following way: 20mL 4M acetone +10mL 1.0M H^+ +20mL 0.0050M I2. How long will it take for the iodine color to disappear in this reaction mixture? Justify your answer.

Explanation / Answer

Zero Order Reaction

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