The Mechanism for the Reaction 2 H₂O₂(aq) $\rightarrow$ 2 H₂O $\ell$ ) + O₂(g) in the Presence of I^-(aq) Is Proposed

question 45

Multiple Choice

The mechanism for the reaction 2 H₂O₂(aq) $\rightarrow$ 2 H₂O( $\ell$ ) + O₂(g) in the presence of I^-(aq) is proposed to be:
Step 1: H₂O₂(aq) + I^-(aq) $\rightarrow$ H₂O(l) + OI^-(aq)
(slow)
Step 2: H₂O₂(aq) + OI^-(aq) $\rightarrow$ H₂O(l) + O₂(g) + I^-(aq)
(fast)
What is the rate law for the overall reaction?

• A) Rate = k[H₂O₂]
• B) Rate = k[H₂O₂]²
• C) Rate = k[H₂O₂][I^-]
• D) Rate = k[H₂O₂][OI^-]
• E) Rate = k[H₂O₂]²[I^-]/[H₂O]

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