how to manufacture large amount of ethyne
Answers
Answer:
Ethyne (acetylene) is generally prepared in a laboratory by the action of water on calcium carbide. Procedure: A thin layer of sand is spread atomic the bottom of a conical flask. A few small pieces of calcium carbide (CaC2) are placed over the sand.
Explanation:
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Preparing ethyne and testing its properties
Ethyne is produced on an industrial scale from calcium carbonate (limestone) and coal:
CaO + 3C → CaC2 + CO
Calcium carbide and water are then reacted to produce ethyne and calcium hydroxide:
CaC2 + 2H2O → Ca(OH)2 + C2H2
Ethyne can also be manufactured by the partial combustion of methane with oxygen, or by the cracking of hydrocarbons.
In this demonstration, I prepare ethyne and do a series of simple tests on the gas to reveal some of its properties.
Procedure
Clamp the side-arm tube vertically and add two or three pieces of calcium carbide. Replace the bung. Connect the delivery tube to the side-arm with the rubber tubing, making sure the end of the delivery tube is under water in an adjacent bowl. Put six test tubes in the bowl and allow them to fill with water. Remove the bung of the side-arm tube and add two or three drops of water. Replace the bung and collect six test tubes of ethyne gas by downward displacement of water. As the gas leaves the delivery tube in the water carefully ignite the ethyne bubbles as they reach the air. A loud bang and a smoky flame are produced.