The following mechanism has been proposed for the reaction of iodide and peroxodisulfate: Step 1: 1'- + 5,02 750,1+ SO , cate = Kx [I-17* * [scoz-]%...
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Iodide and Peroxodisulfate92E343B0-B195-4FBB-B71D-9A824533B7DC.jpeg

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4. The following mechanism has been proposed for the reaction of iodide and
peroxodisulfate:
Step 1:
1'- + 5,02 750,1+ SO , cate = Kx [I-17* * [scoz-]%
Step 2:
I'-+ SO,I > I, + SO,
Step 3: I' + 1, -> 1,
rate = 0044 * [I-]]' * [ Szeg !
a. According to the experimentally determined rate law (Experiment #6), identify
the rate limiting step. Comment on why it is the rate limiting step.
b. The overall reaction is exothermic. Draw a qualitative reaction coordinate
diagram (you may need to look this up in your text book) showing the changes in
potential energy as the three-step mechanism progresses. Label the reactants and
final product, as well as each step on your diagram. The rate limiting step will
have a larger activation energy.
c. On your reaction coordinate diagram show the effect of a catalyst on the
activation energy.

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