Write IUPAC name of the complex: `Na_3[Cr(OH)_2F_4]`

Explanation

To write the IUPAC name of the complex `Na3[Cr(OH)2F4]`, we can follow these steps:

### Step 1: Identify the Components of the Complex
The complex consists of sodium ions (Na⁺) and the coordination entity `[Cr(OH)2F4]`.

### Step 2: Determine the Charge of the Coordination Entity
The sodium ions contribute a total charge of +3 (since there are three Na⁺ ions). Therefore, the coordination entity must have a charge of -3 to balance the overall charge of the compound.

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