Permanganate titrations - Oxidation reduction titrations

These are titrations where potassium permanganate is utilized as an oxidising agent in acidic medium. The medium is organized by the make use of dilute sulphuric acid. Potassium permanganate carries out as a self-indicator. The potential reaction, while potassium permanganate performs like an oxidising agent, is :

2KMnO₄ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 3H₂O + 5 [O]

Or MnO^-₄ + 8H⁺ + 5e → Mn²⁺ + 4H₂O

Before the end point, the solution stay colourless (when KMnO₄ solution is taken in burette) although after the equivalence point only one extra drop of KMnO₄  solution imparts pink colour, that is presence of pink colour shows the end point. Potassium permanganate is required for the estimation of ferrous salts, oxalates, oxalic acid, hydrogen peroxide, etc. The solution of potassium permanganate is all time first standardised before its use.