Question

reaction of potassium permanganate with ferrous sulphate
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Answer 1

Explanation:

Well, we would assume that the ferrous ion is oxidized up to ferric ion, i.e. , and permanganate is reduced to . ... And this reduction proceeds with the decolorization of strongly-red permanganate to give almost colourless, .

Answer 2

The products depend upon the pH. However, this reaction is usually conducted at low pH. Under these conditions the iron (II) sulfate solution is added to acidified potassium permanganate solution, a pale green solution and a purple solution react to form an orange solution. Overall, there is a reduction reaction and an oxidation. The reduction reaction in Mn(7+) to Mn(2+) and the oxidation reaction is of Fe(2+) to Fe(3+). The two half reactions are:

Permanganate (gets reduced) -

MnO4- + 8H+ + 5e- → Mn2+ + 4H2O

and

Iron (gets oxidized)-

5Fe2+ → 5Fe3+ + 5e-

And the overall reaction is -

MnO4- + 8H+ + 5Fe2+ → Mn2+ + 4H2O + 5Fe3+

Under more alkaline conditions, Mn(7+) is still reduced but to MnO2 (Mn(4+).