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Predict which of the following will be c...

Predict which of the following will be coloured in aqueous solution? `Ti^(3+),V^(3+), Cu^(+),Sc^(3+),Mn^(2+),Fe^(3+)` and `Co^(2+)`. Give reasons for each.

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`Ti^(3+),V^(3+),Mn^(2+),Fe^(3+)` and `Co^(2+)` are all coloured.
`MnO_4^(ɵ)` is also coloured but due to charge transfer. Only `Sc^(3+)` `(3d^0)` is colourless.
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