Step 1:H2O2 + I^-^ = H2O + OI^-^

step 2: H2O2 + OI^-^ = H2O + O2 + I^-^

What is the equation for the overall reaction? I am not sure how to do this since there are two equations.

Which species acts as a catalyst? I know that I^-^ is the catalsyt.

Which species acts as a reaction intermediate. I think it is O2

Complete the rate law for the overall reaction. I am not sure for this one.