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  • How is  prepared from pyrolusite? Give steps involved with equations.      <

How is KMnO_{4} prepared from pyrolusite? Give steps involved with equations.

 

 

 

 
 
 
 
 

Answers (1)

→ Alkali metal hydroxide is fused with powedered pyrulosite in the presence of air to form potassium manganate.

      2MnO_{2}+4KOH+O_{2}\rightarrow 2K_{2}MnO_{4}+2H_{2}O

→ Potassium manganate in netural or acidic solution undergo disproportionation to form potassium permanganate.

     MnO_{4}^{2-}+4H^{+}\rightarrow MnO_{4}^{-}+ MnO_{2}+2H_{2}O

Posted by

Sumit Saini

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