Question:medium

How do you prepare potassium manganate from pyrolusite ore?

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Fusion with alkali + oxidising → manganate.

Updated On: Jan 14, 2026

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Solution and Explanation

Reaction of MnO$_2$ (pyrolusite) with KOH and O$_2$:
2MnO$_2$ + 4KOH + O$_2$ → 2K$_2$MnO$_4$ + 2H$_2$O.

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