DOUBLE SALTS:
(1)The addition compounds formed by the combination of
two simple salts are termed as double salts.
(2) Double salts are stable in solid state only.
(3) When dissolved in water, it furnishes all the ions
present in the simple salt form which it has been constituted.
(4)The solution of double salt shows the properties of
the samples salts from which it has been constituted
For examples
Mohar’s salt-FeSO4 (NH4)2SO4
.6H2O (Ferrous ammonium sulphate)
Alum’s- K2SO4Al2
(SO4)3. 24H2O (Potassium ammonium sulphate)
Karnalite-
KCl.MgCl2.6
(H2O)
Dolomite- CaCO3.MgCO3 or CaMg
(CO3)2
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