How many hydrogen-bonded water molecule (s) are associated in `CuSO_(4).5 H_(2)O` ?

Options

A. 5
B. 1
C. 4
D. 3

Explanation

To determine how many hydrogen-bonded water molecules are associated in `CuSO4.5H2O`, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Compound**:
- The formula `CuSO4.5H2O` indicates that there is one copper sulfate (CuSO4) molecule associated with five water (H2O) molecules.

2. **Identifying Water Molecules**:
- The `5H2O` part of the formula signifies that there are five water molecules present in the hydrated form of copper sulfate.

3. **Hydrogen Bonding**:
- In the context of hydrogen bonding, water molecules can form hydrogen bonds with other molecules due to the presence of hydrogen atoms that are covalently bonded to oxygen. Each water molecule can potentially form hydrogen bonds with other polar molecules or ions.

4. **Analyzing the Structure**:
- In the structure of `CuSO4.5H2O`, the water molecules are coordinated to the copper ion (Cu²⁺) and the sulfate ion (SO₄²⁻). Each water molecule can form hydrogen bonds with the sulfate ions and the copper ion.

5. **Counting Hydrogen Bonds**:
- In the case of `CuSO4.5H2O`, it is observed that only one of the water molecules is directly involved in hydrogen bonding with the sulfate ion. The other four water molecules do not participate in hydrogen bonding in the same manner.

6. **Conclusion**:
- Therefore, the number of hydrogen-bonded water molecules associated in `CuSO4.5H2O` is **1**.

### Final Answer:
The number of hydrogen-bonded water molecules in `CuSO4.5H2O` is **1**.