Question

Calculate the rate of reaction for the change 2A -----> Products, when rate constant of the reaction is 2.1 x 10^-5 time^-1 and [A]₀ = 0.2 M.

Answer 1

The unit of rate constant suggest it to be first order.

Thus rate = K [A]

= 2.1 x 10^-5 x 0.2 

= 4.2 x 10^-6 mol litre^-1 sec^-1