Normal Salts :
It is formed by the complete replacement of replaceable hydrogen atoms from an acid molecule by means of a metal or a group of elements acting like a metal.
e.g. NaCl, KCI, FeSO4,Na2SO4, FeCl2, etc., are normal salts.
Acidic Salts :
These salts contains one or more replaceable hydrogen atoms in its molecule.
It is formed by a partial replacement of H-atoms, present in an acid molecule by means of a metal or a positive radical.
e.g. NaHSO4, NaHCO3, KHCO3, NaH2PO4, etc., are acid salts.
Basic Salts :
A salt which contains O2- or OH- group in its molecule is called basic salt.
e.g. Mg(OH)CI, [Mg(OH)2 MgCO3] [Cu(OH), CUCO) etc., are basic salts.
Double Salts :
A double salt is a mixture of two salts which on dissolution in water gives two types of metal ions.
e.g.
Potash alum [K2SO4 Al2(SO4)3 24H2O]
Ferric alum [K2SO4 Fe2(SO4)3 24H2O]
Mohr's salt [FeSO4 (NH4) SO 6H2O]
Complex Salts :
These salts contains a complex ion or complex neutral molecule in which there is a central metal ion surrounded by a number of neutral molecules or negative ions.
e.g. Potassium argento cyanide (KAG(CN2)) tetra amino cupric sulphate (Cu(NH3)4SO4)
Alkaline Salts : Normal salts which are formed by neutralisation of a week acid and strong base are called alkaline salt.
e.g. Na2CO3, CH3COONa, Na2B4O7 etc.
