How would you account for the magnetic behaviour of `[Fe(CN)_(6)]^(3-) and [Fe(CN)_(6)]^(4-)` ?

Explanation

To account for the magnetic behavior of the complexes \([Fe(CN)_6]^{3-}\) and \([Fe(CN)_6]^{4-}\), we will analyze the oxidation states of iron in each complex, the electron configurations, and the effect of the cyanide ligand as a strong field ligand.

### Step 1: Determine the oxidation state of iron in \([Fe(CN)_6]^{3-}\)

1. The overall charge of the complex is \(-3\).
2. The cyanide ion \((CN^-)\) has a charge of \(-1\) and there are 6 cyanide ions.
3. Let the oxidation state of iron be \(x\).
4. Set up the equation:
...