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Zachariah Herrera
Chemistry
24 April, 11:54
Laboratory preparation of ethyne
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Joey Bolton
24 April, 12:14
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Ethyne is prepared by using water and calcium carbide in the laboratory.
Explanation:
Acetylene is conveniently prepared in the laboratory by the action of water (H₂O) on calcium carbide (CaC₂). Calcium carbide in turn is obtained by heating the mixture of coke and lime stone in an electric furnace.
CaC₂ + 2H₂O → Ca (OH) ₂ + C₂H₂
Ethyne gas prepared in the lab using the above method may contain impurities like H₂S, PH₃, AsH₃, NH₃etc. The gas is purified by bubbling it through acidified copper sulfate solution.
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