Question

How is the half-life of a first order reaction related to the concentration of the reactant?

Answer 1

For a first-order reaction, the half-life (denoted as t₁/2​) is independent of the concentration of the reactant.

For a first-order reaction:

`t_(1//2) = 0.693/k`

Where:

t₁/2 is the half-life,

k is the rate constant.

This shows that:

The half-life depends only on the rate constant k,

It does not depend on the initial concentration of the reactant.