Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide, H2O2, can be titrated against a solution of potassium permanganate, KMnO4. The following equation represents the reaction:
2 KMnO4 (aq) + H2O2 (aq) + 3 H2SO4 (aq) -> 3 O2 (g) + 2 MnSO4 (aq) + K2SO4 (aq) + 4 H2O (l)
A certain amount of hydrogen peroxide was dissolved in 100 mL of water and then titrated with 1.68 M KMnO4. What mass of H2O2 was dissolved if the titration required 18.2 mL of the KMnO4 solution?