4. The absorption spectrum of [Ni(NH3)6]2+ in water shows broad absorption with λmax ≈ 370, 625, and 1000 nm. (a) Based

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4. The absorption spectrum of [Ni(NH3)6]2+ in water shows broad
absorption with λmax ≈ 370, 625, and 1000 nm.
(a) Based on the Orgel diagram, determine the transition
involved in the above absorption. (3 marks)
(b) Sketch an absorption spectrum of an aqueous solution of
[Ni(NH3)6]2+. (4 marks)
(c) Show the assignments for each transition in the spectrum in
(b). (3 marks)