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, K M nO4. The following equation represents the reaction: 2KMnO4(aq)+H2O2(aq)+3H2SO4(aq)→3O2( g)+2MnSO4(aq)+K2SO4(aq)+4H2O ( l ) A certain amount of hydrogen peroxide was dissolved in 100. mL of water and then titrated with 1.68 M K M nO4. What mass of H2O2 was dissolved if the titration required 18.8 mL of the K M nO4 solution?