1.

The hexaaqua complex[Ni(H_(2)O)_(6)]^(2+) is green, whereas the corresponding ammonia complex [Ni(NH_(3))_(6)]^(2+) is violet. Explain.

Answer»

SOLUTION :`NH_(3)` is a stronger ligand than `H_(2)O`, SO `[Ni(NH_(3))]^(2+)` will absorb higher energy LIGHT than `[Ni(H_(2)O)_(6)]^(2+)`. Being green, `[Ni(H_(2)O)_(6)]^(2+)` is PROBABLY absorbing higher energy YELLOW green light


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