To measure the Ca2+ concentration, 1mL of human blood was treated withNa2C2O4, an abnormal calcium ion is indicative of disease.
The resulting Na2 C 2O4 precipitate was filtered and dissolved in the dilute H2SO4 .This solution needed 2.05 mL of 4.88 X10-4 M KMnO4 to reach the end point. The balanced equation: 2 KMnO4 (aq) + 5CaSO4 (s) + 10 CO2 (g)+ 8 H2 O (l). Determine the amount of Ca2+ present in the blood.