n-factor of Potassium permanganate in strong alkaline medium is

n-factor of Potassium Permanganate (KMnO₄) in Strong Alkaline Medium

In a strongly alkaline medium, potassium permanganate (KMnO₄) is reduced from an oxidation state of +7 (as MnO₄^-) to +6 (as manganate ion, MnO₄^2-).

Electron Change and n-factor

• The change in oxidation state is from +7 to +6.
• This involves a change of 1 electron per Mn atom.

Therefore, the n-factor of KMnO₄ in strong alkaline medium is 1.

Comparison with Other Media

• In acidic medium: n-factor = 5 (Mn⁷⁺ to Mn²⁺)
• In neutral/weakly basic medium: n-factor = 3 (Mn⁷⁺ to Mn⁴⁺)
• In strong alkaline medium: n-factor = 1 (Mn⁷⁺ to Mn⁶⁺)