The bromination of acetone is acid-catalyzed. CH3COCH3 + Br2 CH3COCH2Br + H+ + Br -
The rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and H+ ions at a certain temperature.
[CH3COCH3] [Br2] [H+] Rate of disappearance of Br2 (M/s)
0.30 0.050 0.050 5.7 10-5
0.30 0.10 0.050 5.7 10-5
0.30 0.050 0.10 1.2 10-4
0.40 0.050 0.20 3.1 10-4
0.40 0.050 0.050 7.6 10-5
(a) What is the rate law for the reaction?
Rate = k[CH3COCH3][H+][Br2]
Rate = k[Br2][H+]
Rate = k[CH3COCH3][H+]
Rate = k[CH3COCH3][Br2]
(b) Determine the rate constant.