What is the oxidation number of Fe in `K_(3)[Fe(C_(2)O_(4))_(3)]` ?

Explanation

To determine the oxidation number of Fe in the complex \( K_3[Fe(C_2O_4)_3] \), we can follow these steps:

### Step 1: Identify the components of the complex
The complex consists of potassium ions (K\(^+\)) and the coordination complex \([Fe(C_2O_4)_3]^{3-}\). The oxalate ligand \(C_2O_4^{2-}\) is a bidentate ligand, meaning it can bind through two sites.

### Step 2: Determine the charge of the complex
The overall charge of the complex ion \([Fe(C_2O_4)_3]^{3-}\) is -3. Since there are three potassium ions (K\(^+\)), which each have a +1 charge, the total positive charge contributed by potassium is +3.

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