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Question

The magnetic moment of [Co(H₂O)6]2+ is approximately: (Co atomic number = 27)

Options

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Explanation

Co₂+ (d7) in [Co(H₂O)6]2+ (octahedral) with weak field H₂O is high spin (t2g5 eg2), 3 unpaired electrons. Magnetic moment = √[3(3+2)] = √15 ≈ 3.87 BM.