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Preparations and Uses of Caustic Soda

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Question

Write a balanced chemical equation for each of the following:
Laboratory preparation of ammonia from ammonium chloride.

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Solution

Laboratory preparation of ammonia from ammonium chloride:
$2 N H_{4} C l + C a (O H)_{2} \to C a C l_{2} + 2 H_{2} O + 2 N H_{3} ↑$
Ammonium chloride is heated with base such as slaked lime. Ammonia gas is then dried with quick lime CaO.

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Preparations and Uses of Caustic Soda

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