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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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?
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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