A second reaction mixture was made up in the following way: 10 ml 4 M acetone +

Question

A second reaction mixture was made up in the following way: 10 ml 4 M acetone + 20 ml 1 M hcl + 10 ml .005 M I2 + 10 ml h2o. a. What were the initial concentrations of acetone, H+ ions, and I2 in the reaction mixture? b. It took 120 seconds for the I2 color to disappear from the reaction mixture. What is the rate of the reaction? A second reaction mixture was made up in the following way: 10 ml 4 M acetone + 20 ml 1 M hcl + 10 ml .005 M I2 + 10 ml h2o. a. What were the initial concentrations of acetone, H+ ions, and I2 in the reaction mixture? b. It took 120 seconds for the I2 color to disappear from the reaction mixture. What is the rate of the reaction? A second reaction mixture was made up in the following way: 10 ml 4 M acetone + 20 ml 1 M hcl + 10 ml .005 M I2 + 10 ml h2o. a. What were the initial concentrations of acetone, H+ ions, and I2 in the reaction mixture? b. It took 120 seconds for the I2 color to disappear from the reaction mixture. What is the rate of the reaction?

Explanation / Answer

a)

Initial concentration of,

[acetone] = 4 M x 10 ml/50 ml = 0.8 M

[H+] = 1.0 M x 20 ml/50 ml = 0.4 M

[I2] = 0.005 M x 10 ml/50 ml = 0.001 M

b. rate of reaction = -d[I2]/dt

                             = 0.001/120

                             = 8.33 x 10^-6 M/s

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