What is the unit of rate constant if the reaction is a first order reaction?

Question

What is the unit of rate constant if the reaction is a first order reaction?

Answer 1

1/time units

sec^-1, min^-1, hr^-1, etc.

Answer 2

Personally, I find the easiest way to find out the unit of the rate constant is by following this:

M^(1 - overall order) s^(-1)

So, if the overall order is 1, then the unit is s^(-1)

If the overall order is 2, then the unit is Ms^(-1)

I hope that helps.