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8.18 Predict for the following, will be coloured in an aqueous solution? Give reason.

(vi)\; Fe^{3+}

 

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Yes, the aqueous solution of Fe^{3+} (ferric ion) will be coloured due to half-filled electron in it d-orbitals(d^{5}) and because of that, a d-d transition will occur, which is responsible for colour
electronic configuration of 
Fe^{3+}=[Ar]^{18}3d^{5}4s^{0}

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manish

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