Write the IUPAC name of `[Ni(H_2O)_6](ClO_4)_2`

Explanation

To write the IUPAC name of the coordination compound \([Ni(H_2O)_6](ClO_4)_2\), we can follow these steps:

### Step 1: Identify the Coordination Complex
The coordination complex in the given compound is \([Ni(H_2O)_6]^{2+}\). Here, nickel (Ni) is the central metal ion, and it is surrounded by six water molecules (H2O) acting as ligands.

### Step 2: Determine the Oxidation State of the Metal
To find the oxidation state of nickel (Ni), we can set up the equation based on the overall charge of the coordination complex:
- Let the oxidation state of Ni be \(x\).
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