Question

Specify the oxidation number of the metal in the following coordination entity:

[Cr(NH₃)₃Cl₃]

Specify the oxidation number of the metal in the following coordination entity:

[CrCl₃(NH₃)₃]

Answer 1

Let the oxidation number of chromium (Cr) be x.

Hence, x + 3 × (0) + 3 × (−1) = 0

∴ x = +3