For a reaction : `2H_(2)O_(2)(I^(-))/("alkaline medium")2H_(2)O+O_(2)`
the proposed mechanismis as given below:
(1) `H_(2)O_(2)+I^(-)toH_(2)O+IO^(-)` (slow)
(2) `H_(2)O_(2)+IO^(-)toH_(2)O+I^(-)+O_(2)` (fast)
(i) Write rate law for the reaction.
(ii) Write the overall order of reaction.
(iii) Out of steps (1) and (2), which one is rate determining step ?

Explanation

Let's solve the problem step by step.

### Given Reaction:
\[ 2H_2O_2 + I^- \xrightarrow{\text{alkaline medium}} 2H_2O + O_2 \]

### Proposed Mechanism:
1. \( H_2O_2 + I^- \rightarrow H_2O + IO^- \) (slow)
2. \( H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2 \) (fast)
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