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What are DOUBLE SALTS ?

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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