`[Fe(H_2O)_6]^(3+)` is strongly paramagnetic whereas `[Fe(CN)_6]^(3-)` is weakly paramagnetic. Explain.

Explanation

To explain why `[Fe(H₂O)₆]^(3+)` is strongly paramagnetic while `[Fe(CN)₆]^(3-)` is weakly paramagnetic, we can follow these steps:

### Step 1: Identify the oxidation state of iron in both complexes.
- For `[Fe(H₂O)₆]^(3+)`, the oxidation state of iron (Fe) is +3.
- For `[Fe(CN)₆]^(3-)`, the oxidation state of iron is also +3.

### Step 2: Determine the electron configuration of Fe³⁺.
- The electron configuration of neutral iron (Fe) is `[Ar] 3d^6 4s^2`.
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