Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution.

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: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 KMnO4 . What mass of H2O2 was dissolved if the titration required 12.8 mL of the KMnO4 solution?Express your answer with the appropriate units.