Homework SourseThe reactants A and B are mixed and the reaction is timed un
The reactants A and B are mixed, and the reaction is timed until a color change occurs. The data are as follows:
[A]
[B]
Time (s)
0.100
0.140
25
0.050
0.140
50
0.100
0.070
100
Determine the rate law.
| [A] | [B] | Time (s) |
| 0.100 | 0.140 | 25 |
| 0.050 | 0.140 | 50 |
| 0.100 | 0.070 | 100 |
Solution
In the given data,
The reaction time get doubled when the [A] is halved and the reaction time increased by 4 times when [B] is halved thus the rate of reaction is first order with respect to A and second order with respect to B. Hence rate law is
r = k[A][B]^2
![The reactants A and B are mixed, and the reaction is timed until a color change occurs. The data are as follows: [A] [B] Time (s) 0.100 0.140 25 0.050 0.140 50](/WebImages/40/the-reactants-a-and-b-are-mixed-and-the-reaction-is-timed-un-1123980-1761598860-0.webp "The reactants A and B are mixed, and the reaction is timed until a color change occurs. The data are as follows: [A] [B] Time (s) 0.100 0.140 25 0.050 0.140 50")
