Chapter 13, Problem 101RQ

The oxidation of NO to ${\text{NO}}_{\text{2}}$, one of the reactions in the production of smog, appears to involve carbon monoxide. A possible mechanism is

$\begin{array}{l}\text{CO +}\cdot \text{OH}\to {\text{CO}}_{\text{2}}\text{+ H}\cdot \\ \text{H}\cdot {\text{+ O}}_{\text{2}}\to \text{HOO}\cdot \\ \text{HOO}\cdot \text{+ NO}\to \cdot {\text{OH + NO}}_{\text{2}}\end{array}$

(The formulas with dots represent extremely reactive species with unpaired electrons and are called free radicals.) Write the net chemical equation for the reaction.