Highly stable lyophilic sols, such as heavily hydrated gelatin, are frequently added to extremely se — Surface Chemistry Chemistry Question

💡 Solution & Explanation

Lyophilic sols possess a high affinity for the solvent. When added, they physically adsorb onto the surface of the lyophobic particles, forming a dense, protective solvation layer (sheath). This layer acts as a physical/steric barrier, rigidly preventing the lyophobic particles from approaching each other closely enough to be aggregated by added electrolytes.