The bromination of aceton is acid –catalyzed. CH3COCH3 + Br2 + H+ ---------> CH3COCH2Br + 2H+ + Br- The rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and H+ ion at a certain temperature. A B C [ CH3COCH3] [Br2] [ H+]Rate of disapperance [ Br2]0.300.0500.0505.7 x 10 -50.300.100.0505.7 x 10 –50.300.0500.101.2 x 10 -40.400.0500.203.1 x 10 -4 Write the rate law.Find the rate constant.Determine the half-life of the reaction if the [A]o = 0.50M ; [B]o = 0.40 M; [C]o = 0.6 M. ( Half-life is based on over all order of the reacaction)

We have to find rate law and value of rate constant

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Write the rate law. Find the rate constant

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter13: Substitution

Section: Chapter Questions

Problem 43CTQ

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Question

The bromination of aceton is acid –catalyzed.

CH₃COCH₃ + Br₂ + H⁺ ---------> CH₃COCH₂Br + 2H⁺ + Br^-

The rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and H⁺ ion at a certain temperature.

A B C

[ CH₃COCH₃]	[Br₂]	[ H⁺]	Rate of disapperance [ Br₂]
0.30	0.050	0.050	5.7 x 10 ^-5
0.30	0.10	0.050	5.7 x 10 ^–5
0.30	0.050	0.10	1.2 x 10 ^-4
0.40	0.050	0.20	3.1 x 10 ^-4

Write the rate law.
Find the rate constant.
Determine the half-life of the reaction if the [A]_o = 0.50M ; [B]_o = 0.40 M; [C]_o = 0.6 M. ( Half-life is based on over all order of the reacaction)

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