Preparation Of Potassium Permanganate – KMnO4 Potassium permanganate is commercially prepared by mixing solution of KOH and powdered manganese oxide, with oxidizing agents like potassium chlorate. The mixture is boiled evaporated and the residue is heated in iron pans until it has acquired a pasty consistency.

How is 5% solution of KMnO4 is prepared?

The mass of KMnO4 is 150 grams. Hence to make 5 % solution of KMnO4 you will need 7.5 g of KMnO4.

Can we prepare standard solution of KMnO4?

As potassium permanganate is not a primary standard it can be standardized by using sodium oxalate or oxalic acid. The former is preferred over oxalic acid as available in a higher standard of purity (99.95%). It’s available in the anhydrous form.