AgCl beinga covalent molecule is insoluble in water and hence hydrophobic.

Dispersion of AgCl in Water:

AgCl is the chemical formula for silver chloride. When silver chloride is dispersed in water, it forms a dispersion known as a hydrophobic sol.

Explanation:

1. Hydrophobic Sol:
A hydrophobic sol is a dispersion in which the dispersed particles are insoluble in water and tend to repel water molecules. In other words, the solute particles have a low affinity for water. AgCl, being an ionic compound, is insoluble in water and does not easily dissolve to form ions. Instead, it forms a dispersion of solid particles in water.

2. AgCl in Water:
When AgCl is added to water, it forms a dispersion in which the AgCl particles are suspended in the water. These particles do not dissolve completely, but rather remain as solid particles throughout the dispersion. The dispersion appears cloudy or milky due to the presence of these solid particles.

3. Insolubility of AgCl:
AgCl is insoluble in water due to the strong ionic forces holding the Ag+ and Cl- ions together in the crystal lattice. These forces are stronger than the forces of attraction between the ions and water molecules. As a result, AgCl does not dissociate into ions when added to water, and instead remains as solid particles.

4. Hydrophobic Nature:
The hydrophobic nature of AgCl can be attributed to the ionic character of the compound. The ionic forces between the Ag+ and Cl- ions are stronger than the forces of attraction between water molecules and the ions. This results in the AgCl particles repelling water molecules and remaining as insoluble solid particles in water.

Conclusion:

In conclusion, the dispersion of AgCl in water is a hydrophobic sol because the AgCl particles are insoluble in water and tend to repel water molecules. The hydrophobic nature of AgCl is due to the ionic character of the compound, which results in the formation of a dispersion of solid particles in water.