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Solved: The bromination of acetone is acid-catalyzed:
Chapter 13, Problem 13.79(choose chapter or problem)
The bromination of acetone is acid-catalyzed: CH3COCH3 Br2 88 catal H y Sst CH3COCH2Br H Br The rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and H1 ions at a certain temperature: Rate of Disappearance [CH3COCH3] [Br2] [H ] 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: B O B (fast equilibrium) CH3OCOCH3 H3O 34 CH3OCOCH3 H2O OH A CH (slow) 3OCOCH3 H2O 88n CH3OCPCH2 H3O OH B OH A CH (fast) 3OCPCH2 Br2 88n CH3OCOCH2Br HBr O B OH Show that the rate law deduced from the mechanism is consistent with that shown in (a).
Questions & Answers
QUESTION:
The bromination of acetone is acid-catalyzed: CH3COCH3 Br2 88 catal H y Sst CH3COCH2Br H Br The rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and H1 ions at a certain temperature: Rate of Disappearance [CH3COCH3] [Br2] [H ] 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: B O B (fast equilibrium) CH3OCOCH3 H3O 34 CH3OCOCH3 H2O OH A CH (slow) 3OCOCH3 H2O 88n CH3OCPCH2 H3O OH B OH A CH (fast) 3OCPCH2 Br2 88n CH3OCOCH2Br HBr O B OH Show that the rate law deduced from the mechanism is consistent with that shown in (a).
ANSWER:Step 1 of 4
The given reaction is as follows;
Experiment |
||||
1 |
0.30 |
0.050 |
0.050 |
|
2 |
0.30 |
0.10 |
0.050 |
|
3 |
0.30 |
0.050 |
0.10 |
|
4 |
0.40 |
0.050 |
0.20 |
|
5 |
0.40 |
0.050 |
0.050 |
