A sample of hydrazine sulphate (N2H6SO4) was dissolved in 100 mL of water and 10 mL of this solution was reacted with excess of ferric chloride solution and warmed to complete the reaction. Ferrous ion formed was estimated and it required 20 mL of M50 potassium permanganate solution. Estimate the amount of hydrazine sulphate in 1 L of the solution. Reactions are given below:
4Fe3++N2H4→N2+4Fe2++4H⨁.
MnO⊝4+5Fe2++8H⨁→Mn2++5Fe3++4H2O