Chemistry
The following questions are pertaining to the laboratory preparation of Ammonia gas.
(a) Write a balanced chemical equation for its preparation mentioning the conditions required.
(b) Why is a higher ratio by weight of the alkali used?
(c) How is Ammonia gas collected?
Ammonia
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Answer
(a) 2NH4Cl + Ca(OH)2 ⟶ CaCl2 + 2H2O + 2NH3↑
Finely grounded mixture of ammonium chloride and calcium hydroxide in excess is taken in a round-bottom flask fitted in a slanting position and gently heated to liberate ammonia gas.
(c) Ammonia gas is collected in inverted gas jars by the downward displacement of air.
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