
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:5. Iodide is oxidized in acid solution by hydrogen peroxide:
H2O2(ag) + 2 H*(ag) + 2 I(ag) → L(ag) + 2 H20(1)
A proposed mechanism is:
Step 1:
Slow
Н-О2(ад) + I(ag) — Н-О() + OF(ад)
Step 2:
Fast
H*(ag) + OI (ag)→ HOI(ag)
Step 3:
Fast
HOI(ag) + H*(ag)
I2(ag) + H2O(1)
a) Show that the three elementary steps add up to give the overall, stoichiometric equation.
b) What is the molecularity of each step?
c) For this mechanism to be consistent with kinetic data, what must be the experimental rate
equation?
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