Consider the Following Mechanism for the Oxidation of Bromide Ions

question 75

Multiple Choice

Consider the following mechanism for the oxidation of bromide ions by hydrogen peroxide in aqueous acid solution. H⁺ + H₂O₂ ⇄ H₂O⁺−OH (rapid equilibrium) H₂O⁺−OH + Br⁻ → HOBr + H₂O (slow) HOBr + H⁺ + Br⁻ → Br₂ + H₂O (fast)
Which of the following rate laws is consistent with the mechanism?

• A)Rate = k[H ₂O ₂][H ⁺] ²[Br ⁻]
• B)Rate = k[H ₂O ⁺−OH][Br ⁻]
• C)Rate = k[H ₂O ₂][H ⁺][Br ⁻]
• D)Rate = k[HOBr][H ⁺][Br ⁻][H ₂O ₂]
• E)Rate = k[Br ⁻]

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