Aqueous solution of Ni²⁺ contains [Ni(H₂O)₆]²⁺ and its magnetic moment is 2.83 BM. When ammonia is added in it, comment on the magnetic moment of solution

Ni²⁺(3d⁸) ion contains two unpaired electrons irrespective of the strength of the ligand field strength.

Hence,  its magnetic moment is 2.83 BM. It is not affected when water ligand is replaced with ammonia ligand

μ=$\sqrt{\mathrm{n}\left(\mathrm{n}+2\right)}$​ 

= $\sqrt{2\left(2+2\right)}$

$=2\sqrt{2}$

=2×1.414=2.828 B.M.