Question

The half-life period for a first-order reaction is

Answer 1

Half-life

• The half-life of a reaction is the time in which the concentration of a reactant is reduced to one-half of its initial concentration.
• It is represented as $t_{1/2}$.

Half-life period for first order

• For a first-order reaction, the half-life period is constant.
• It is independent of the initial concentration of the reacting species.

Expression for the half-time period for first order

• The equation for the half-time period is as follows:-

$t_{1/2}=\frac{0.693}{k}$

• Here, $k$ is the rate constant and $t_{1/2}$ is the half-time period.