Question

How do I determine the units of the rate constant for a zero order, first order, second order, and third order reaction?

Answer 1

For order n the rate constant has units :- mol^(1-n)·L^(n−1)·s^−1

A zero-order reaction has a constant rate that is independent of the concentration of the reactants. The rate law is ; rate= k. In the case of a zero-order reaction, the rate constant k will have units of concentration/time. (mol/L/sec or M/sec)

Second Order Reactions are characterized by the property that their rate is proportional to the product of two reactant concentrations. Unit of rate constant (k) = L /mol /s.

Answer 2

It is the sum of the powers of the slowest step of the reaction.