`H^(+)` ions in aqueous solutions exist as ..........ions.

Answer

To solve the question "H^(+) ions in aqueous solutions exist as ..........ions," we need to understand the behavior of hydrogen ions (H^(+)) in water.

### Step-by-Step Solution:

1. **Understanding H^(+) Ions**:
- In aqueous solutions, hydrogen ions (H^(+)) do not exist freely. Instead, they interact with water molecules.

2. **Interaction with Water**:
- Water (H2O) is a polar molecule with oxygen having two lone pairs of electrons. When H^(+) ions are introduced to water, they attract the lone pairs of electrons from the oxygen atom in water.

3. **Formation of Hydronium Ion**:
- When H^(+) combines with a water molecule, it forms a new ion known as the hydronium ion (H3O^(+)). This occurs because the H^(+) ion effectively accepts a lone pair of electrons from the water molecule.

4. **Charge Distribution**:
- The resulting hydronium ion (H3O^(+)) has a positive charge due to the addition of the H^(+) ion to the neutral water molecule.

5. **Conclusion**:
- Therefore, in aqueous solutions, H^(+) ions exist as hydronium ions (H3O^(+)).

### Final Answer:
H^(+) ions in aqueous solutions exist as hydronium ions (H3O^(+)).

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