Question

What happens when a freshly prepared precipitate of $Fe{\left( {OH} \right)_3}$ ​ is shaken with a small amount of $FeC{l_3}$ solution?

Answer 1

Peptization, also known as deflocculation, is the act of turning a precipitate into a colloid by shaking it with a peptizing agent, a suitable electrolyte. This is especially relevant in colloid chemistry and aqueous precipitation processes.

Complete answer:
The process of peptidition involves distributing the precipitate into a colloidal form. Peptization is the process of converting a precipitate into a colloidal sol by shaking it with a dispersion medium in the presence of a little amount of electrolyte. Peptization, also known as deflocculation, is the process of converting a precipitate into a colloid by shaking it with an electrolyte. This is especially essential in colloid chemistry or for precipitation reactions in an aqueous solution.
Colloidal dispersion of $Fe{\left( {OH} \right)_3}$ is created when a recently made precipitate of $Fe{\left( {OH} \right)_3}$ is agitated with a tiny amount of $FeC{l_3}$ solution. Peptization is the term for this procedure. By adding an appropriate electrolyte, a precipitate is transformed into colloidal particles during peptization. $FeC{l_3}$ solution is used as a peptizing agent in the example above.

Note:
It should be noted that, in nanoparticle synthesis, peptization is used to break a large collection of particles into many primary particles. Changing the surface characteristics, applying a charge, or adding a surfactant are all ways to accomplish this. Peptization is the adsorption of quaternary ammonium cation on the titania surface during the manufacture of titania (titanium dioxide) nanoparticles. The surface becomes positively charged as a result of this.