Chemistry - Chemical Kinetics Question with Solution | TestHub

The rate law is determined by the slow step: $rate=k_2[\mathrm{O}][{\mathrm{O}}_2]$. From the fast equilibrium, $[\mathrm{O}]=K_{eq}[{\mathrm{O}}_3]/[{\mathrm{O}}_2]$. Substituting gives $rate=k[{\mathrm{O}}_3{]}^2[{\mathrm{O}}_2{]}^{-1}$.