4 A reaction between the substances A and B 3A 2 B 2 C D g

4, A reaction between the substances A and B (3A + 2 B 2 C + D) gives the following data [B Rate of appearance of C (molL-1h-1) (molL-) (molL-1) 1.0 x 10-2 1.0× 10-2 2.0× 10-2 2.0 x 10-2 3.0× 10-2 0.3× 10-6 8.1 × 10-6 3.24 x 10-5 1.20 x 10-6 7.30 × 10-5 Determine the rate law for the reaction.

Solution

see experiment 2 and 3:
[A] doubles
[B] is constant
rate becomes 4 times
so, order of A is 2

see experiment 1 and 2:
[A] is constant
[B] becomes 3 times
rate becomes 27 times
so, order of B is 3

Rate law is:
rate = k*[A]^2*[B]^3