The Following Reaction in Aqueous Solution Was Found to Be $\rarr$

question 104

Multiple Choice

The following reaction in aqueous solution was found to be first order in [OH^-], first order in [C₂H₅Br], and inverse first order in Br^-.

C₂H₅Br + OH^- $\rarr$ C₂H₅OH + Br^-

Which one of the following mechanisms is consistent with the observed reaction order?

• A)C₂H₅Br C₂H₅⁺ + Br^- fast C₂H₅⁺ + OH^- C₂H₅OH slow
• B)C₂H₅Br +H₂O C₂H₅OH + H⁺ + Br^- slow H⁺ + OH^- H₂O fast
• C)C₂H₅Br C₂H₅⁺ + Br^- slow C₂H₅⁺ + OH^- C₂H₅OH fast
• D)C₂H₅Br C₂H₅⁺ + Br^- slow OH^- + Br^- HOBr fast HOBr + C₂H₅⁺ C₂H₅OH + Br^- fast

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