Complexes and preipitates of nickel (II) are formed by adding ammonium hydroxide, ethylenediamine, and dimethylglyoxime to dilute solutions of Ni2+ in beakers. Cyanide salts and solutions are ...

Ammonium ions (NH 4 +) – found in ammonium compounds such as ammonium chloride ... by heating a solution of the ions with sodium hydroxide. This reaction produces ammonia gas, as shown in ...