For the reaction occuring in aqueous solution: I-(aq) + OCl- (aq) ---> Ol- (aq)

ID: 823209 • Letter: F

Question

For the reaction occuring in aqueous solution:

I-(aq) + OCl- (aq) ---> Ol- (aq) + Cl- (aq)

The following mechanism has been proposed:

OCl- + H2O ---> HOCl + OH-

<---

k -1

I- + HOCl ---> HOI + Cl-

HOI + OH- ---> H2O + Ol-

a) What is the rate law expression for the reaction for Ol- based on this mechanism? [OH-] should appear in the rate law

b) The initial rate reaction was studied and the following data was obtained:

[ I-] (M) [OCl-] (M) [OH-] (M) Initial Rate (M*s-1)

2.0 x 10^-3 1.5 x 10^-3 1.00 1.8 x 10^-4

4.0 x 10^-3 1.5 x 10^-3 1.00 3.6 x 10^-4

2.0 x 10^-3 3.0 x 10^-3 2.00 1.8 x 10^-4

4.0 x 10^-3 3.0 x 10^-3 1.00 7.2 x 10^-4

c) Is the predicted rate law expression derived from the mechanism consistent with these data? Explain

(a)First, add all the equations in the mechanism together to see if the stoichiometry of the mechanism is correct:

OCl

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