Aqueous solution of Ni 2+ contains [Ni (H 2 O) 6 ] 2+ and its magnetic moment is 2.83 BM when ammonia is added in it , commment on the magnetic moment of solution.

Step-by-step solution

Ammonia is consered a strong ligand generally, but in reality, strength of a ligand depends on the metal it is interacting with. As it stands, NH 3 isn't a strong enough ligand to cause pairing up in Ni, hence the magnetic moment remains the same. Ni H 2 O 6 2 + + 6 NH 3 → Ni NH 3 6 2 + + 6 H 2 O sp 3 d 2 Hybridisation sp 3 d 2 Hybridisation μ = 2.8 BM μ = 2.8 BM