Question

Is the h2o ligand inducing a strong or weak field?

Answer 1

Water is relatively weak field.

Step-by-step explanation:

Here's a good example... :

[Mn(H2O)6]2+:

Total electron count = -7 (Mn) - 12 (water ligands) + 2 (charge) = -17, 17 e-

Oxidation state, +2 = Mn + (0), Mn = +2, Mn(II)

d electrons, +2 (oxidation state) - 7 (valence electrons) = -5, d5

Because Mn is a first row transition metal, relatively low oxidation state, with a weak field ligand, the complex will be high spin with 5 unpaired electrons.

So if you have a weak ligand, the complex is high spin.

Answer 2

The answer is weak field