Question

The oxidation state of Fe in [Fe(CN)₆]³⁻ is ______.

Answer 1

The oxidation state of Fe in [Fe(CN)₆]³⁻ is +3.

Explanation:

Let the oxidation state of Fe = x.

Each cyanide ligand (CN⁻) has a charge = –1.

The overall charge of the complex ion is –3.

So the equation is:

x + 6(−1) = −3

x − 6 = −3

x = −3 + 6

x = +3