CBSE Class 12-science Answered
Explain the preparation of Potassium pemanganate ?
Asked by Abhijith C | 11 Nov, 2012, 05:29: AM
Expert Answer
When manganese dioxide is fused with potassium hydroxide in the presence of air or an oxidising agent such as potassium nitrate or chlorate, potassium manganate is formed, possibly via potassium manganite.
fused
MnO2 + 2KOH ? K2MnO3 + 4H2O] × 2
potassium manganite
2K2MnO3 + O2 ? 2K2MnO4 + 2H2O
fused
2MnO2 + 4KOH + O2 ? 2K2MnO4 + 2H2O
pyrolusite potassium manganate
Answered by | 12 Nov, 2012, 01:26: PM
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