How many water molecules are involved in coordination in `CuSO_4 .5H_2O` ?

Explanation

To determine how many water molecules are involved in coordination in `CuSO4 . 5H2O`, we can follow these steps:

### Step 1: Understand the Structure of `CuSO4 . 5H2O`
`CuSO4 . 5H2O` is known as copper(II) sulfate pentahydrate, which means it contains one copper ion (Cu²⁺), one sulfate ion (SO₄²⁻), and five water molecules (H₂O).

**Hint:** Remember that the number of water molecules in the formula indicates how many are present, but not necessarily how many are coordinated.

### Step 2: Identify Coordination in Copper Compounds
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