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प्रश्न
How is methane prepared in the laboratory?
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आकृती
दीर्घउत्तर
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उत्तर
Reactants: Sodium ethanoate (sodium acetate) and soda lime.
Since sodium hydroxide is deliquescent, soda lime (a mixture of sodium hydroxide and calcium oxide) is used, which is in the form of a white porous mass or granules.
Procedure: A mixture of sodium ethanoate (sodium acetate) and soda lime is taken in a hard glass test tube (as shown in Fig.) and heated over a bunsen burner.
Reaction: \[\ce{CH3COONa + NaOH ->[CaO][300^\circ C] Na2CO3 + CH4 ^}\]
Collection: The gas evolved is collected by downward displacement of water since it is slightly soluble in water and is lighter than air.
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Hydrocarbons: Alkanes
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