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Instant Fire. Potassium chlorate, KClO 3, is a white, crystalline or powdery solid which is a very good oxidizing agent; it is used in explosives, fireworks, matches, etc. When it decomposes under heating (especially in the presence of a manganese catalyst), it releases molecular oxygen, O 2 : 2KClO 3 (s) â.
In this experiment, you will determine the percent KClO 3 in an unknown mixture containing an unreactive chloride. By converting the weight loss to moles of oxygen lost, we calculate the moles of potassium chlorate in the starting material.rom the moles of potassium chlorate we can convert to mass and then the percent of potassium chlorate in the unknown mixture. A catalyst, MnO 2 (manganese (IV) oxide), is added to the reaction mix to speed up the reaction.