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Hydration of Metal Ions

OCR A-level ChemistryTransition MetalsLesson 16 of 21

Transition metal 2+ ions form octahedral hexaaqua II complexes with water. Transition metal 3+ ions form hexaaqua 3+ ions in water. In both cases water forms six co-ordinate bonds with the central metal ion. Hexaaqua complexes are slightly acidic in water due to their dissociation of water molecules to release H+ ions.

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Key terms in this lesson

co-ordinate bond
A covalent bond in which both shared electrons are supplied by one of the two bonding atoms. Also called a dative covalent bond.

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