The half life for the second order decomposition of HI is 15.4 S when the initial concentration of HI is 0.67 M. What is the rate constant for this reaction?

Answer 1

The half life for a 2nd order reaction is given by

t_1/2 = 1 / k[A]_o

15.4 s = 1 / k [0.67 M)

k = 1 / (15.4 s)(0.67 M)

k = 0.097 M^-1s^-1