The half-life for the zero order reaction A → Products is 276 s. What is the value of the rate constant for the reaction if the initial concentration of A is 0.697?

Answer 1

For a zero order reaction, the rate in independent of the concentration of reactant. The rate law is

rate = k

t_1/2 = [A]_o / 2k

276 s = 0.697 M / 2k

2k = 0.697 M / 276 s = 0.002525 M/s

k = 0.00126 M/s