Write short notes on Peptisation.

1.	Write short notes on Peptisation.
Answer» Peptisation:- It is observed that freshly precipitated substances can often be redispersed into colloidal state by suitable reagents, generally with an ion in common with the material to be dispersed. Thus fresh precipitate of Re(OH)₃ readily passes into colloidal form when treated with dil. FeCl₃solution. This process of transferrin back a precipitate into colloidal state is called Peptisation. The ferric chloride which has caused the dispersion is known as Peptising Agent. It the converse of coagulation and may be regarded as redispersion of coagulation sol.

Answer»

Peptisation:- It is observed that freshly precipitated substances can often be redispersed into colloidal state by suitable reagents, generally with an ion in common with the material to be dispersed. Thus fresh precipitate of Re(OH)₃ readily passes into colloidal form when treated with dil. FeCl₃solution.

This process of transferrin back a precipitate into colloidal state is called Peptisation.

The ferric chloride which has caused the dispersion is known as Peptising Agent.

It the converse of coagulation and may be regarded as redispersion of coagulation sol.

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