Explain the difference between a double salt and a complex salt.

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> [!TLDR]
> Double salts break up fully into simple ions in water; complex salts give a stable complex ion instead.
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> Both double salts and complex (coordination) salts are formed by combining two or more simple salts, but they behave very differently when dissolved in water.
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> Double salt:
> - It exists only in the crystalline (solid) state.
> - On dissolving in water it dissociates completely into all its constituent simple ions.
> - These simple ions give their usual (independent) chemical tests.
> - Example: Mohr's salt, FeSO4.(NH4)2SO4.6H2O, dissolves to give Fe2+, NH4+ and SO4^2- ions, and Fe2+ answers the tests of ferrous ion.
>   Another example: potash alum, K2SO4.Al2(SO4)3.24H2O, gives K+, Al3+ and SO4^2- ions.
>
> Complex salt:
> - It retains its identity both in the solid state and in solution.
> - On dissolving, it does NOT give all the simple ions; instead it furnishes a stable complex ion.
> - The metal inside the complex ion does not give its ordinary ionic tests. …

Q.Explain the difference between a double salt and a complex salt.

Concept understanding — Double Salt and Coordination Complex

Q.Explain the difference between a double salt and a complex salt.

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