A mechanism for a naturally occurring reaction that destroys ozone is: Step 1: O₃(g) + HO(g) → HO₂(g) + O₂(g)
Step 2: HO₂(g) + O(g) → HO(g) + O₂(g)
Which species is a catalyst and what type of catalysis is occurring?

Question

Quizplus · Accepted Answer

HO is the catalyst in this mechanism as it appears in the first step as a reactant, but is regenerated in the second step as a product. This is an example of homogeneous catalysis, as the catalyst and reactants are all in the same phase (gaseous).

A Mechanism for a Naturally Occurring Reaction That Destroys Ozone