Question

Calculate the half-life of a first order reaction having a value of 2 × 10⁻³ s⁻¹ for its rate constant.

Answer 1

Given:

First-order reaction

Rate constant: k = 2 × 10⁻³ s⁻¹

By using half-life formula for a first-order reaction

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

= `0.693/(2 xx 10^-3)`

= `0.693/0.02`

= 346.5 seconds