The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism:
step 1 slow: H2O2 + I^- → H2O + OI^ -
step 2 fast: H2O2 + OI^- → H2O + O2 + I^-
(1) What is the equation for the overall reaction? Use the smallest integer coefficients possible. If a box is not needed, leave it blank.