Q3
If 1 mL of a KMnO4 solution react with 0.140 g Fe2+ and if 1 mL of KHC2O4.H2C2O4 solution react with 0.1 mL of previous KMnO4 solution, how many milliliters of 0.20 M NaOH will react with 1 mL of previous KHC2O4.H2C2O4 solution in which all the protons (H+) are ionisable?