Question

Mention any three differences between lyophilic and lyophobic colloids.

Answer 1

Hint: Lyophilic and lyophobic colloids are the type of colloidal based on the interaction between dispersed and dispersion phase. In lyophilic colloids, the dispersed phase has good interaction with the dispersion phase. In lyophobic colloids, the dispersed phase itself does not interact with the dispersion phase. We have to make them by using specific methods.

Complete Step by step answer: A colloid is a heterogeneous mixture in which a phase remains dispersed in the suspension. The size of colloidal particles varies from $10$ to $1000\,{{\text{A}}^ \circ }$. Particles of colloidal solution carry a charge. The charge of the colloidal solution depends upon the change of ions adsorbed.
The phase which remains dispersed is known as the dispersed phase. The phase in which the dispersed phase solubilizes is known as the dispersion phase.
On the basis of interaction between the dispersed phase and dispersion phase, the colloids are divided into two parts:
-Lyophilic
-Lyophobic
-Lyophilic colloids are liquid loving means dispersed phase easily interacts with the dispersion phase so, they can easily form by mixing whereas lyophobic colloid are liquid hater so, the dispersed phase does not interact easily with the dispersion phase so, they can be prepared by special methods only.
-Lyophobic colloids are reversible colloids whereas lyophobic colloids are irreversible -colloids.
Lyophobic colloids are stable. They do not coagulate so, do not require stabilizer whereas
-lyophobic require stabilizer because they coagulate easily.

Note: Lyophilic colloid can be separated by just evaporation and can again form by remixing, so they are reversible. Metal sulphides are the lyophobic colloids that are made by a specific method such as gold sol which is prepared by Bredig’s arc method. Lyophobic colloids are reversible colloids whereas lyophobic colloids are irreversible colloids. Lyophobic colloids are not stable because of heating or shaking they coagulate. When the dispersion phase is water then the lyophilic colloid is known as hydrophilic colloid and the lyophobic colloids are known as hydrophobic colloids.