The initial rate of the reaction A + B === C + D is determined for different ini
ID: 944885 • Letter: T
Question
The initial rate of the reaction A + B === C + D is determined for different initial conditions, with the results listed in the table.
Experiment [A](M) [B](M) Rate M/s
1 0.185 0.133 3.35x10^-4
2 0.185 0.266 1.35x10^-3
3 0.370 0.133 6.75x10^-4
4 0.370 0.266 2.7x10^-3
a) What is the order of reaction with respect to A? (Enter anwer numerically)
b) What is the order of reaction with respect to B? (Enter anwer numerically)
c)What is the overall reaction order? (Enter anwer numerically)
d)What is the value of the rate constant, k? (Three significant figures)
Explanation / Answer
a) Going from experiment 1 to 2, [A] remains same while [B] doubles. Also Rate increases by four times. Hence order of reaction with respect to [B] will be 2.
b) Going from experiment 1 to 3, [B] remains same while [A] doubles. Also Rate gets doubled. Hence order of reaction with respect to [A] will be 1.
c) Total order = 2+1 = 3
d) Rate = k[A][B]2
Consider experiment 1,
3.35 * 10-4 = k(0.185)(0.133)2
k = 0.102 M-2s-1
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