Question

Most solubility rules I can find state that "most ammonium salts are highly soluble". I wonder if there are actually any insoluble salts containing the ammonium ion. If none of ammonium salts is soluble, can there be other ways of getting rid of ammonium ions in water? That is, precipitation or liberation as NH₃?

Answer 1

Most ammonium salts are highly soluble, but there are exceptions. Ammonium carbonate is one example of an insoluble ammonium salt. Other ways of removing ammonium ions from water include precipitation and liberation as ammonia gas.

Step-by-step explanation:

The solubility rules state that most ammonium salts are highly soluble. However, there are exceptions to this rule. For example, ammonium carbonate (NH4)2CO3 is insoluble in water.

Although there are insoluble salts containing the ammonium ion, there are other ways to remove ammonium ions from water. One way is through precipitation, where a salt is formed by reacting the ammonium ion with a suitable reagent. Another way is by liberating ammonia gas (NH3) through a reaction with a strong base, such as sodium hydroxide (NaOH).