Q. 25 C4.7( 3 Votes )

Describe the prep

Answer :

Potassium Permanganate can be prepared from the pyrolusite ore. The pyrolusite is finely powdered and fused with potassium hydroxide or potassium carbonate in the presence of air or an oxidizing agent such as potassium nitrate or potassium chlorate, then a green mass of Potassium Manganate is obtained.

The reaction is follows:

2MnO2 + 4KOH + O2 2K2MnO4 + 2H2O

Green Mass

3K2MnO4+ 2CO2 2KMnO4 + MnO2 + 2K2CO3

Potassium Permanganate acts as a strong oxidizing agent. The example is as follows:

2KMnO4 + H2O 2KOH + 2MnO2 + 3O

Due to the tendency of MnO4- ion to get reduced, potassium permanganate acts as an oxidizing agent in the neutral medium.

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