Answer
2$H_{2} $$O_{2}$ - $\gt$ 2$H_{2}$O + $O_{2}$
Work Step by Step
Br- is added to the reaction in miniscule quantities, it appears in the reactants initially and then in the products therefore it is a catalyst.
BrO- is a reaction intermediate as it appears in the first step of the reaction and then in the second step doesn't appear in the overall reaction.
