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11 Dec 2019
A student is performing rate measurements for the reaction of I- with H2O2 in a buffer solution. The rate law for the reaction is known to be Rate = kâ[I-]1[H2O2]1. The student mixed 6 ml of DI water, 1.0 ml of Buffer, 1 ml of 0.3 M KI, 1 ml of 0.02 M Na2S2O3,1 ml of 0.1 M H2O2 and 5 drops of starch and notices a color change after 54 seconds. What time would it take the solution to change the color if:
a) The concentrations of both KI and H2O2 were decreased by a factor of 2
b) The concentration of Na2S2O3 was increased by a factor of 2.
A student is performing rate measurements for the reaction of I- with H2O2 in a buffer solution. The rate law for the reaction is known to be Rate = kâ[I-]1[H2O2]1. The student mixed 6 ml of DI water, 1.0 ml of Buffer, 1 ml of 0.3 M KI, 1 ml of 0.02 M Na2S2O3,1 ml of 0.1 M H2O2 and 5 drops of starch and notices a color change after 54 seconds. What time would it take the solution to change the color if:
a) The concentrations of both KI and H2O2 were decreased by a factor of 2
b) The concentration of Na2S2O3 was increased by a factor of 2.
Keith LeannonLv2
13 Dec 2019