Problem

The bromination of acetone is acid-catalyzed:The rate of disappearance of bromine was meas...

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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