Question

Using the method of initial rates for the reaction a → b, if the initial concentration of a is doubled and the rate of reaction quadruples, what is the order of reaction with respect to a?

Answer 1

Answer is: reaction is second order with respect to a.
This second order reaction is proportional to the square of the concentration of reactant a.
rate of reaction = k[a]².
k is second order rate constant and have unit M⁻¹·s⁻¹.
Integrated rate law for this reaction: 1/[a]=1/[a]₀ + kt.
t is time in seconds..