Answer to Question #301544 in Inorganic Chemistry for jona

Question

A second order reaction has a half-life of 18 s when the initial concentration of reactant is 0.71 M. What is the rate constant for this reaction at M^—1s^—1?

Answer 1

Second order reaction for calculating rate constant is

t_1/2 = 1/KC_AO

Half Life period = 18 s

Initial Concentration of reactant = 0.71M

18s = 1/K(0.71M)

K = 0.0782 M^-1s^-1