Why `BaSO_(4)` is insoluble whereas `BeSO_(4)` is soluble in water ?

Explanation

To understand why BaSO₄ (barium sulfate) is insoluble in water while BeSO₄ (beryllium sulfate) is soluble, we need to analyze the concepts of lattice enthalpy and hydration enthalpy.

### Step-by-Step Solution:

1. **Define Lattice Enthalpy**:
- Lattice enthalpy is the amount of energy required to separate one mole of an ionic solid into its gaseous ions. A higher lattice enthalpy indicates a stronger ionic bond in the solid.

2. **Define Hydration Enthalpy**:
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