Question
The bromination of acetone cytosine and guanine solution is represented by this equation.
CH3COCH3 (aq) + Br2 (aq) →CH3COCH2Br (aq) + H+ (aq) + Br- (aq)
These kinetic data were obtained for given reaction concentrations.
|
Initial Concentrations, M
|
||
| [CH3COOH] | [Br2] | [H+] |
| 0.30 | 0.05 | 0.05 |
| 0.30 | 0.10 | 0.05 |
| 0.30 | 0.10 | 0.10 |
| 0.40 | 0.05 | 0.20 |
Initial rate, disappearance of Br2, ms-1
5.7 x 10-5
5.7 x 10-5
1.2 x 10-4
3.1 x 10-4
Based on these data, the rate equation is
-
Rate = k[CH3COCH3][H+]
-
Rate = k[CH=COCH3][Br2]
-
Rate = k [CH3COCH3][Br2][H+]
-
Rate = k [CH3COCH3][Br2][H+]
Solution
A.
Rate = k[CH3COCH3][H+]
By comparing the rate and concentration, the order of the reaction can be calculated.
Let the rate of the reaction wrt [CH3COCH3], [Br2] and [H+] are x,y and z respectively. Thus,
