For the reaction show below determine the rate law. CH 3 COCH 3 + Br 2 CH 3 COCH

Question

For the reaction show below determine the rate law.

CH3COCH3 + Br2 CH3COCH2Br + HBr(aq)

The bromination of acetone, an organic solvent, is catalyzed by an acid. The rate of disappearance of bromine was measured for several different concentrations of the reactants including the catalyst, H+. Therefore, the catalyst will appear in the rate law, but not in the overall reaction.

The following data were obtained:

Calculate the rate law for this reaction:

rate = k [CH3COCH3]  [Br2]  [H+]  

[CH3COCH3] [Br2] [H+] Initial Rate (mol/L s) 0.30 0.05 0.05 5.7 x 10-5 0.30 0.10 0.05 5.7 x 10-5 0.30 0.05 0.10 11.7 x 10-5 0.40 0.05 0.05 7.6 x 10-5

Explanation / Answer

rate = k [CH3COCH3]1 [Br2]0 [H+]1

rate is independent on Br2

and first order with respect to CH3COCH3

first order with respect to H+

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