H2O2, or hydrogen peroxide, is a chemical compound consisting of two hydrogen atoms and two oxygen atoms. It is commonly used as a disinfectant and bleaching agent.
IO^-, or hypoiodite ion, is a negatively charged molecule containing one iodine atom and one oxygen atom. It forms in Step 1 and reacts further in Step 2.
The rate law describes the relationship between the concentrations of reactants and the rate of a chemical reaction. In this context, it would describe how the concentration of H2O2 affects the overall reaction rate.