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[Ti(H2O)6]3 is coloured while [Sc(H2O)6]3 is colourless. Explain. |
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Answer» Ti [Ti(H2O)6]3 is in +3 oxidation state and Sc in [Sc(H2O)6]3 is in +3 oxidation state. The outer electronic configuration of Sc, Ti and the corresponding trivalent ions are Sc21 : 3d1 4s2 Sc3+ : 3d0 Ti22 : 3d1 4s2 Ti3+ : 3d1 Since there is no electron in 3d orbitals of Sc d-d transition is not possible hence [Sc(H2O)6]3+ is colourless. But Ti3+ in [Ti(H2O)6]3+ has one electron in 3d orbitals hence d-d transition is possible hence it is coloured. |
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