Pyrolusite is MnO2 I- MnO42-II-MnO4-Steps I and II are respectively -

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Potassium Permanganate

Pyrolusite is...

Question

Pyrolusite is $M n O_{2} I \to M n O_{4}^{2 -} I I \to M n O_{4}^{-}$
Steps I and II are respectively :

fuse with KOH / air and electrolytic oxidation.

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fuse with

K O H / K N O_{3}

and electrolytic oxidation.

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fuse with conc.

H N O_{3} / a i r

and electrolytic reduction.

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dissolve in

H_{2} O

and oxidation.

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M n O_{2}

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I

I I

M n O_{2}

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M n O_{2} I \to M n O_{4}^{2 -} I I \to M n O_{4}^{-}

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_{2}

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