Potassium Permanganate VS

KMnO₄ = 158.0

For a 0.02m solution Dissolve 3.2 g of potassium permanganate in water and dilute to 1000.0 mL with the same solvent. Heat the solution for 1 h on a water-bath, allow to cool and filter through a sintered-glass filter (2.1.2).

Standardisation. Dissolve 0.300 g of ferrous ethylenediammonium sulfate in 50 mL of sulfuric acid (49 g/L H₂SO₄). Titrate with the potassium permanganate solution, determining the end-point potentiometrically (2.2.20) or using 0.1 mL of ferroin as indicator. Standardise immediately before use.

1 mL of 0.02 M potassium permanganate is equivalent to 38.21 mg of Fe(C₂H₁₀N₂)(SO₄)₂,4H₂O.

Storage Protected from light.