Question

In a first order reaction the concentration of the reaction is decreased from 1.0 M to 0.25 M in 20 minutes the rate constant of a reaction would be

Answer 1

this will be rate constant

Answer 2

Answer:

The rate constant of a reaction would be $0.0693 min6{-1}$

Explanation:

Rate of the reaction = k

Initial concentration = $[A_o]$=1.0M

Initial concentration [A]= 0.25 M

For first order order reaction:

$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$

$k=\frac{2.303}{20 min}\log\frac{[1.0 M]}{[0.25 M]}$

$k =0.0693 min6{-1}$

The rate constant of a reaction would be $0.0693 min6{-1}$