The correct answer is: B. Low Energy of dissociation
Baryllium sulfate is a sparingly soluble salt. This means that it does not dissolve easily in water. The low solubility of barium sulfate is due to its high lattice energy. Lattice energy is the energy required to separate one mole of an ionic solid into its constituent ions. The higher the lattice energy, the less soluble the salt will be.
The lattice energy of barium sulfate is high because it is an ionic compound with a strong ionic bond. The barium ions have a +2 charge and the sulfate ions have a -2 charge. These ions are attracted to each other very strongly, which makes it difficult to separate them.
The other options are incorrect because they do not explain why barium sulfate is less soluble in water.
- Option A: High inflammable energy. This is not a factor that affects the solubility of a substance.
- Option C: Low inflammable energy. This is also not a factor that affects the solubility of a substance.
- Option D: Lonic band. This is a term that is not used in chemistry.