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Show with balanced equations what happen...

Show with balanced equations what happens when the following are mixed.
(i). Aqueous solution of potassium manganate and acid.
(ii). Aqueous solution of potassium chromate and acid.

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(i). Permanganate is formed.
`2MnO_4^(2-)+4H^(o+)toMnO_2+MnO_4^(ɵ)+2H_2O`
(ii). Yellow-coloured chromate changes to orange-cooured dichromate.
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