In permanganate titrations potassium permanganate is used as

Last updated: 6/28/2023

In permanganate titrations potassium permanganate is used as an oxidizing agent in acidic medium The medium is maintained acidic by the use of dilute sulphuric acid Potassium permanganate acts as self indicator The potential equation when potassium permanganate acts as an oxidizing agent is 2KMnO4 3H SO4 K SO4 2MnSO4 3H O 5 0 or MnO4 8H 5e Mn 4H O Before the end point the solution remains colourless but after the equivalence point only one extra drop of KMnO4 solution imparts pink colour i e appearance of pink colour indicates end point These titrations are used for estimation of ferrous salts oxalic acid oxalates hydrogen peroxide As O3 etc For decolourization of 1 mol of KMnO4 the number of moles of H C O4 required is