Which of the following methods is commonly NOT used for the commercial preparation of ammonium chloride?
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A.
Reacting ammonium sulphate with sodium chloride, involving heating, evaporation and cooling
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B.
Reacting sodium chloride with carbon dioxide and ammonia in the Solvay process
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C.
Reacting ammonia with hydrogen chloride gas or hydrochloric acid
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D.
Electrolysis of ammonium salts
Correct Answer:
D. Electrolysis of ammonium salts
Explanation:
Electrolysis of ammonium salts is not a standard commercial method for producing ammonium chloride. In contrast, industrial production typically relies on the Solvay process, where it is a byproduct of sodium carbonate manufacture using sodium chloride, ammonia, and carbon dioxide. It is also commonly synthesized through the direct neutralization of ammonia with hydrogen chloride gas or hydrochloric acid. Additionally, it can be prepared by reacting ammonium sulphate with sodium chloride, utilizing their different solubilities at specific temperatures to separate the product through heating and cooling cycles.
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