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Which is the correct equation?
Member rating: No Rating | Words: | Submitted: Mon Dec 11 2006
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Chemistry Skill P: Which is the correct equation? Potassium nitrate (KNO3) is a crystalline, white compound which is prepared commercially by reacting potassium chloride and sodium nitrate. Its uses in industry range from acting as a food preservative, to use in the manufacturing of explosives and fertilisers. This plan is to test which of the following two equations are accurate in measuring the gas products formed from heating KNO3: * 2KNO3(s) ----------> 2K02(s) + 02(g) * 2KNO3(s) ----------> K20(s) + 2NO2(g) + 1/2 02(g) It is noticeable that a different number of moles of gas are produced on heating potassium nitrate in the two equations. To determine which is correct, a calculated amount of potassium nitrate will be heated, and the volume of gas given off will be measured. The number of moles of gas calculated from this volume will provide the answer. Equipment: * Gas syringe and holder * Retort stand and boss * Additional boss and...
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