Consider the Following Mechanism for the Oxidation of Bromide Ions

question 18

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[H₂O₂][H⁺]²[Br^-]
• B) Rate = k[H₂O+-OH][Br^-]
• C) Rate = k[H₂O₂][H⁺][Br^-]
• D) Rate = k[HOBr][H⁺][Br^-][H₂O₂]
• E) Rate = k[Br^-]

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