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Nomenclature of Unsaturated Compounds

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Question

Explain the laboratory preparation of ethyne. [2 marks]

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Solution

In laboratory, calcium carbide reacts with water to form ethyne. [1 mark]

$C a C_{2} c a l c i u m c a r b i d e (s) + 2 H_{2} O (l) \to C a {(O H)}_{2} c a l c i u m h y d r o x i d e (a q) + C_{2} H_{2} e t h y n e (g)$ [1 mark]

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