Oxalic acid is a reducing agent, it reduces permanganate to manganous ion. Thereby changing the colour of KMnO4 solution, acting as a self indicator 2 MnO4-(aq ) + 5 H2C2O4(aq ) + 6 H3O+(aq ) --> 2Mn2+(aq ) + 10 CO2(aq ) + 14 H2O The equation for the oxidation of oxalate by permanganate in … Read more