ACTION OF SULPHUR DIOXIDE WATER ON AMMONIUM PERMANGANATE

The action of sulphur dioxide water (sulphurous acid) on ammonium permanganate tends to the formation of a dark brown precipitate of the general composition : x (NH4)2O, y MnO, z MnO2. The filtrate shows distinctly acidic reactions due to the presence of sulphuric acid formed during the reaction. Ammonium sulphate, manganese sulphate and ammonium dithionate are the various products of reaction The dark brown precipitate, when sulphurous acid is further added, is completely redissolved, the reaction at this stage being represented by the equation : 14(NH4)MnO4 + 37 H2SO3 = 2 (NH4)2,S2O6 + 5(NH4)2SO4 +14 MnSO4 +14 H2SO4 + 23 H2O.

Keywords

Ammonium permanganate, Ammonium permanganate, Recrystallise, Distilled water

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