What is the coordination number of Fe in `[Fe("edta")]^(-)` ?

Explanation

To determine the coordination number of Fe in the complex \([Fe(\text{edta})]^-\), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Central Metal Atom**:
The central metal atom in the complex is iron (Fe).

2. **Understand the Ligand**:
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