Question
Distinguish between double salt and coordination complex.

Answer

  Double salt Coordination complex
i. A double salt dissociates in water completely into simple ions. A coordination complex dissociates in water with at least one complex ion.
ii. Double salts give tests for all their constituent ions. Coordination complexes do not give tests for all their constituent ions.
iii. Double salts lose their identity when dissolved in water. Coordination complexes do not lose their identity when dissolved in water.
iv. e.g. Mohr’s salt, $FeSO_4(NH_4)_2SO_4.6H_2O$ e.g. $K_4[Fe(CN)_6]$

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