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Complex compounds vs double salts
Short answer
Complex compounds have a central metal ion bound to ligands by coordinate bonds and remain intact in solution; double salts are combinations of simple salts that completely dissociate into all ions in water. Example: K₄[Fe(CN)₆] is a complex, while Mohr's salt is a double salt.
Differentiate between complex compounds and double salts.
| Basis | Complex compound | Double salt |
|---|---|---|
| Formation | Central metal ion bonded to ligands by coordinate bonds | Two simple salts combined in a fixed ratio |
| Stability in solution | Complex ion remains intact | Breaks into its constituent ions |
| Ions | Complex ion and counter ion | All ions of both salts |
| Properties | New properties (colour, magnetism) different from the components | Properties of the component salts |
| Test | Metal in complex ion gives no normal test | Gives tests of all ions |
| Example | K₄[Fe(CN)₆] | Mohr's salt, KAl(SO₄)₂·12H₂O |
✓ Answer checked by Claude Opus 5.5 (high effort)
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