Question

A study of chemical kinetics of the reaction A + B → Products, gave the following data at 25ºC.

Experiment	[A]	[B]	d [Products]dt
1	1.0	0.15	4.20 × 10-6
2	2.0	0.15	8.40 × 10-6
3	1.0	0.20	5.60 × 10-6

Calculate the rate law -

(A) K [A] 

(B) K [B] 

(C) K [A] [B] 

(D) None of these

Answer 1

Correct Option (C) K [A] [B] 

Explanation:

Doubling the concentration of A increases the rate by two times. Raising the concentrating of B by 4/3 times increases the rate of B by 4/3 times. Thus the reaction is of first order with respect to both A and B. So rate law = K [A] [B]