Explanation:
In the reaction between potassium ferrocyanide and KMnO4 in acidic solution, the permanganate ion (MnO4-) acts as the oxidizing agent. It undergoes reduction, accepting electrons from the ferrocyanide ion (Fe(CN)64-), which is oxidized in the process. The balanced chemical equation for the reaction is:
2KMnO4 + 10Fe(CN)64- + 8H+ → 2Mn2+ + 10Fe(CN)63- + 5H2O
In this reaction, the permanganate ion (MnO4-) is reduced from an oxidation state of +7 to an oxidation state of +2, while the ferrocyanide ion (Fe(CN)64-) is oxidized from an oxidation state of +2 to an oxidation state of +3.
