Chemistry - Chemical Kinetics Question with Solution | TestHub

For a second order reaction, the rate law is given by:

$\text{Rate}=k[A{]}^2$

Substituting the given values:

$1.25\times 10^{-2}=k(0.5{)}^2$

$k=\frac{1.25\times 10^{-2}}{0.25}$

$k=5\times 10^{-2}=0.05{\text{ M}}^{-1}{\text{s}}^{-1}$

Answer: $0.05$ ${\text{M}}^{-1}{\text{s}}^{-1}$