The number of water molecules connected through coordinate bond in `CuSO_(4).5H_2O`?

Answer

To determine the number of water molecules connected through coordinate bonds in CuSO₄·5H₂O, we can follow these steps:

### Step 1: Understand the Composition of CuSO₄·5H₂O
CuSO₄·5H₂O is copper(II) sulfate pentahydrate. It consists of one copper ion (Cu²⁺), one sulfate ion (SO₄²⁻), and five water molecules (H₂O).

**Hint:** Identify the components of the compound and their roles.

### Step 2: Identify the Central Metal Ion
In this compound, the central metal ion is copper (Cu²⁺). This ion can form coordinate bonds with water molecules.

**Hint:** Recognize the central metal ion in coordination compounds.

### Step 3: Determine the Coordination of Water Molecules
In CuSO₄·5H₂O, four of the five water molecules are coordinated to the copper ion through coordinate bonds. A coordinate bond is formed when one atom provides both electrons for the bond.

**Hint:** Recall that in coordination complexes, the metal ion can bond with ligands (in this case, water molecules) through coordinate bonds.

### Step 4: Identify the Remaining Water Molecule
The fifth water molecule is not coordinated to the copper ion; instead, it is involved in hydrogen bonding with the sulfate ion (SO₄²⁻).

**Hint:** Differentiate between coordinate bonds and hydrogen bonds in the structure.

### Step 5: Conclusion
Thus, the number of water molecules connected through coordinate bonds in CuSO₄·5H₂O is 4.

**Final Answer:** 4