The bromination of acetone is acid-catalyzed:
The rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and H+ ions at a certain temperature:
| [CH,COCH3] (M) | [Br2] (M) | [H+] (M) | Rate of disappearance of Br2 (M/s) |
(1) | 0.30 | 0.050 | 0.050 | 5.7 × 10−5 |
(2) | 0.30 | 0.10 | 0.050 | 5.7 × 10−5 |
(3) | 0.30 | 0.050 | 0.10 | 1.2 × 10−4 |
(4) | 0.40 | 0.050 | 0.20 | 3.1 × 10−4 |
(5) | 0.40 | 0.050 | 0.050 | 7.6 × 10−5 |
(a) What is the rate law for the reaction? (b) Determine the rate constant, (c) The following mechanism has been proposed for the reaction:
Show that the rate law deduced from the mechanism is consistent with that shown in part (a).
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