Double salts, like carnallite or potash alum, dissociate completely into simple ions when dissolved. In contrast, complex ions, such as [Fe(CN)₆]⁴⁻ in K₄[Fe(CN)₆], do not dissociate into individual ions.
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Double salts, like carnallite or potash alum, dissociate completely into simple ions when dissolved. In contrast, complex ions, such as [Fe(CN)₆]⁴⁻ in K₄[Fe(CN)₆], do not dissociate into individual ions.
Double salts and complexes differ in their behavior when dissolved in water. Double salts, such as KCl⋅MgCl₂⋅6H₂O or FeSO₄⋅(NH₄)₂SO₄⋅6H₂O, dissociate into simple ions completely, releasing individual ions upon dissolution. In contrast, complexes, like [Fe(CN)₆]⁴⁻ in K₄[Fe(CN)₆], do not dissociate into Fe²⁺ and CN⁻ ions upon dissolution. The complex remains intact in the solution, maintaining its structural integrity. This distinction arises from the nature of bonding; double salts consist of separate ions, while complexes involve coordination compounds with ligands tightly bound to a central metal ion.