(i) Formation of a basic salt — A basic salt is formed by partial replacement of hydroxyl radicals of a diacidic or triacidic base with an acid radical.
(ii) Components of a basic salt — A basic salt contains a cation [metallic], a hydroxyl ion [of a base] and an anion [of an acid].
For example — Basic copper nitrate Cu[OH]NO3 , basic copper chloride Cu[OH]Cl
Acid, normal or basic salt —
(i) bleaching powder — Normal salt (Mixed salt)
(ii) potassium mercuric iodide — Normal salt (Complex salt)
(iii) sodium sulphite — Normal salt
(iv) sodium hydrogen sulphite — Acid salt
(v) sodium silver cyanide — Normal salt (Complex salt)
(vi) basic lead nitrate — Basic salt
(vii) potassium zincate — Normal salt
(viii) alum — Normal salt (Double salt)
(ix) calcium bicarbonate — Acid salt
(x) basic copper chloride — Basic salt
(xi) trisodium phosphate — Normal salt