15. A reaction takes place in the following elementary steps: (CH3)3C–Br –––> (C

Question

15. A reaction takes place in the following elementary steps: (CH3)3C–Br –––> (CH3)3C + + Br– (slow) (CH3)3C + + H2O ––––> (CH3)3C–OH2 + (fast) (CH3)3C–OH2 + + H2O ––––> (CH3)3C–OH + H3O + (fast) Which of the following statements concerning the reaction is/are CORRECT? 1. In this reaction, bromide ion (Br– ) is a reaction intermediate. 2. The following rate law is consistent with the mechanism: rate = k[(CH3)3C-Br][H2O ] 3. The correct equation for the complete reaction is- (CH3)3C–Br + 2 H2O ––––> (CH3)3C–OH + Br– + H3O + A) 1 only B) 2 only C) 3 only D) 1 and 3 E) 1, 2, and 3

Explanation / Answer

(CH3)3C–Br –––> (CH3)3C + + Br– (slow step) Br-is intermediate

1. In this reaction, bromide ion (Br– ) is a reaction intermediate.

3. The correct equation for the complete reaction is- (CH3)3C–Br + 2 H2O ––––> (CH3)3C–OH + Br– + H3O +

D) 1 and 3

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