K M n O 4 can be prepared from K 2 M n O 4 as per the reaction, 3 M n O 4 2 - + 2 H 2 O ⇌ 2 M n O 4 - + M n O 2 + 4 O H - The reaction can go to completion by removing O H - ions by adding

Question

K M n O 4 can be prepared from K 2 M n O 4 as per the reaction, 3 M n O 4 2 - + 2 H 2 O ⇌ 2 M n O 4 - + M n O 2 + 4 O H - The reaction can go to completion by removing O H - ions by adding, C O 2, S O 2, HCl, KOH

MARKS App · Accepted Answer

To remove OH- ion a weak acid ( H 2 C O 3 ) is required because a strong acid can reverse the reaction. So here HCl is a strong acid so it reverse the reaction. KOH is strong base which will increase OH- concentration. S O 2 will react with water to form a strong acid H 2 S O 4 . C O 2 combines with O H - ion to give carbonate which is easily removed.

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