A student dissolved a 0.139g sample of oxalic acid, Hâ‚‚Câ‚‚Oâ‚„, in water in an Erlenmeyer flask. Then the student titrated the Hâ‚‚Câ‚‚Oâ‚„ solution in the flask with a solution of KMnOâ‚„, which has a dark purple color. The balanced chemical equation for the reaction that occurred during the titration is shown above.
Identify the species that was reduced in the titration reaction. Justify your answer in terms of oxidation numbers
