Potassium Nitrate is a crystalline salt, KNO3; a strong oxidizer used especially in making gunpowder, as a fertilizer, and in medicine.

Application

Weigh out 1 kg (2.2 lbs) of potassium nitrate to be purified. Put 500 ml of water in the 2 litre pot. Heat the pot containing the water over an electric or gas stove element and add approximately one half the potassium nitrate. Stir well to dissolve.