The [Ni (H2O)6]2+ ion has an absorption maximum at about 725 nm, whereas the [Ni (H2O)6]2+ ion

Question:

The [Ni (H2O)6]2+ ion has an absorption maximum at about 725 nm, whereas the [Ni (H2O)6]2+ ion absorbs at about 570nm. Predict the color of a solution of each ion. (b) The [Ni(en)3]2+ ion occurs at about 520 nm. From these data, indicate the relative strengths of the ligand fields created by the four ligands involved.