To measure the concentration of an aqueous solution of H2O2, an analytical chemist adds strong acid to a 22.0g sample of the solution and titrates it to the endpoint with 42.4mL of 0.400M potassium permanganate (KMnO4) solution. The balanced chemical equation for the reaction is: 6H+(aq)+5H2O2(aq)+2MnO4(aq)5O2(g)+2Mn2+(aq)+8H2O(l)