Question

Peptization is a :

• A. Process of converting soluble particles to form coloidal solution
• B. Process of converting a colloidal solution into precipitate
• C. Process of converting precipitate into colloidal solution
• D. Process of bringing colloidal molecule into solution

Answer 1

The correct option is C Process of converting precipitate into colloidal solution

The process of converting a precipitate into colloidal sol by shaking with dispersion medium in the presence of a small amount of electrolyte​ is called peptization.

Process of peptization:
The precipitate adsorbs electrolyte ​ions on its surface​. This causes the development of positive or negative charge on precipitates,​ which ultimately break up into smaller particles of colloid size.​
Example:
Freshly precipitated $Fe(OH{)}_3$ ​is shaken with aqueous ​solution of $FeC{l}_3$.​