It also shows that ammonia and hydrogen chloride ... in the reverse process. The reaction between anhydrous copper(II) sulfate and water is used as a test for water. The white solid turns blue ...

ammonium nitrate and ammonium sulfate – can be identified by heating a solution of the ions with sodium hydroxide. This reaction produces ammonia gas, as shown in the ionic equation below: ...

Atmospheric nitrogen, with the aid of an iron catalyst, reacts with hydrogen to produce ammonia. That reaction produces lots of ammonia – worldwide production is 160 million tons every year.