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What happens when you react ammonium chloride with calcium hydroxide?

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thephoenixand... | Student | (Level 1) Salutatorian

Posted May 3, 2013 at 1:40 PM via iOS

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What happens when you react ammonium chloride with calcium hydroxide?

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llltkl | College Teacher | (Level 3) Valedictorian

Posted May 4, 2013 at 3:39 PM (Answer #1)

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Ammonium chloride reacts with a base like calcium hydroxide to produce gaseous ammonia. The balanced chemical equation for the reaction is:

2NH4Cl + Ca(OH)2 = CaCl2 + 2NH3 (g) + 2H2O

Ammonium chloride is the salt of a weak base (NH4OH) and a strong acid (HCl). Calcium hydroxide is a strong base. In the reaction the weak base of the ammonium chloride (NH4˄+) is replaced by the strong base from calcium hydroxide (Ca˄2+). Also, the ammonium ion is ported into ammonia which is discharged and H+ which reacts with the OH- of the calcium hydroxide to produce water. This reaction is often exploited to demonstrate synthesis of ammonia to the school students.

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