QUESTION 2 The decomposition of hydrogen peroxide is catalyzed by iodide in a two-step process: H202 +I-H20 + IO- I0- +H202-H20+ O2 +I- (slow) (fast) 2H202 -2H20 + 02 What is the rate law predicted by this mechanism? Rate = k[H2O2] Rate = k[H2O2][I %3D %3D Rate = k[H2O22 Rate = k[H2O2][I0] %3D

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Chapter1: Chemical Foundations
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**Question 2**

The decomposition of hydrogen peroxide is catalyzed by iodide in a two-step process:

1. \( \text{H}_2\text{O}_2 + \text{I}^- \rightarrow \text{H}_2\text{O} + \text{IO}^- \) (slow)
2. \( \text{IO}^- + \text{H}_2\text{O}_2 \rightarrow \text{H}_2\text{O} + \text{O}_2 + \text{I}^- \) (fast)

Overall reaction:

\[ 
\underline{2\text{H}_2\text{O}_2 \rightarrow 2\text{H}_2\text{O} + \text{O}_2} 
\]

**What is the rate law predicted by this mechanism?**
- ○ Rate = k[\(\text{H}_2\text{O}_2\)]
- ○ Rate = k[\(\text{H}_2\text{O}_2\)][\(\text{I}^-\)]
- ○ Rate = k[\(\text{H}_2\text{O}_2\)]^2
- ○ Rate = k[\(\text{H}_2\text{O}_2\)][\(\text{IO}^-\)]
Transcribed Image Text:**Question 2** The decomposition of hydrogen peroxide is catalyzed by iodide in a two-step process: 1. \( \text{H}_2\text{O}_2 + \text{I}^- \rightarrow \text{H}_2\text{O} + \text{IO}^- \) (slow) 2. \( \text{IO}^- + \text{H}_2\text{O}_2 \rightarrow \text{H}_2\text{O} + \text{O}_2 + \text{I}^- \) (fast) Overall reaction: \[ \underline{2\text{H}_2\text{O}_2 \rightarrow 2\text{H}_2\text{O} + \text{O}_2} \] **What is the rate law predicted by this mechanism?** - ○ Rate = k[\(\text{H}_2\text{O}_2\)] - ○ Rate = k[\(\text{H}_2\text{O}_2\)][\(\text{I}^-\)] - ○ Rate = k[\(\text{H}_2\text{O}_2\)]^2 - ○ Rate = k[\(\text{H}_2\text{O}_2\)][\(\text{IO}^-\)]
Expert Solution
Step 1

Rate of reaction depends on slow step reaction, because it is a rate determining step.

H2O2 + I ➡️ H2O + IO-

So rate of reaction depends on concentration of reactants of slow step reaction.

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