All salts are ionic compounds. A salt is formed when a metallic ion or an ammonium ion replaces one or more hydrogen ions of an acid. We will study about this substance in detail in this chapter.
Solubility:
All nitrates, and all ammonium, sodium and potassium salts are soluble in water. Most chlorides and sulphates are also soluble, while the majority of carbonates are insoluble.
Learning the solubility of salts is important before learning how the salts are formed. The solubilities in detail are:
Nitrates: All soluble
Chlorides: All soluble, EXCEPT silver chloride AgCl, lead (II) chloride PbCL2, and mercury (II) chloride HgCl2.
Sulphates: All soluble, EXCEPT calcium sulphate CaSO4, barium sulphate BaSO4 and lead (II) sulphate PbSO4.
Carbonates: All insoluble, except group I carbonates and ammonium carbonate.