#### Answer

The half-life of a second order reaction is dependent on concentration

#### Work Step by Step

The half-life reaction of a first order reaction is = $\frac{0.693}{k}$
The half-life reaction of a first order reaction is = $ \frac{1}{k[A]_{0}}$
thus we can compare the two equations and see that the second order reaction is inversely proportional to the concentration.