potassium per chlorate

A mixture of potassium chlorate (KClO 3 ) and manganese dioxide (MnO 2 ) (4 : 1) is heated in a dry test tube. The oxygen evolved is collected over water. The decomposition of KClO 3 is accelerated even at lower temperatures as MnO 2 acts as a catalyst...

When Potassium chlorate is heated strongly it decomposes to give oxygen. But if a catalyst like manganese dioxide is mixed with it, oxygen is liberated at much lower temperature, in much shorter time. Potassium chlorate and manganese dioxide are mixed in the ..

Group 16 (VIA) Oxygen and Sulphur..

If in a compound, oxygen is less than the oxygen present in a compound ending with ite then, it is given the prefix hypo- in the beginning and if oxygen present in a compound ending with ate is more then it is given the prefix per- in the beginning. Example: KClO - potassium hypochlorite..

A catalyst is a substance that increases the rate of chemical reaction without itself undergoing any change. Examples: Hydrogenation of oils to form fats takes place faster, in presence of nickel. Decomposition of potassium chlorate (KClO 3 ) is greatly accelerated in presence ..

When sulphur is mixed with potassium nitrate, potassium chlorate etc., it forms an explosive mixture. When struck or heated or ignited, the mixture explodes e.g. gun powder. ..

Discovery of Optical Activity The earliest optically active substances were all inorganic like quartz, rock crystals and so on. Later crystals of potassium chlorate, potassium bromate and sodium periodate were also found to exhibit optical activity. Howeve..

Any of the above mentioned methods could be used to prepare oxygen in the laboratory. Mercuric and silver oxides are not used for the preparation of oxygen, as they are very expensive. For the laboratory preparation of oxygen from any of the compounds like lead dioxide, trilead tetroxide, pota..

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Chemical Properties of Sulphur - With Oxidising Agents - When sulphur is mixed with potassium nitrate, potassium chlorate etc., it forms an explosive mixture. When struck or heated or ignited, the mixture explodes e.g. gun powde..