Conversion of precipitate into colloidal solution is known as______.
Peptization is the process
responsible for the formation of stable dispersion of colloidal particles in
dispersion medium. In other words it may be defined as a process of converting
a precipitate into colloidal sol by shaking it with dispersion medium in the
presence of small amount of electrolyte. The electrolyte used in this process
is called as peptizing agent.
This is particularly
important in colloid chemistry or for precipitation reactions in an aqueous
solution. When colloidal particles bear a same sign electric charge, they
mutually repel each other and cannot aggregate together. Freshly precipitated
aluminium or iron hydroxide is extremely difficult to filter because the very
fine colloidal particles directly pass through a paper filter. To facilitate
the filtration, the colloidal suspension must be first flocculated by adding a
concentrated solution of salt to the system.
Peptization is the process responsible for the formation of stable dispersion of colloidal particles in dispersion medium. In other words it may be defined as a process of converting a precipitate into colloidal sol by shaking it with dispersion medium in the presence of small amount of electrolyte. The electrolyte used in this process is called as peptizing agent.
This is particularly important in colloid chemistry or for precipitation reactions in an aqueous solution. When colloidal particles bear a same sign electric charge, they mutually repel each other and cannot aggregate together. Freshly precipitated aluminium or iron hydroxide is extremely difficult to filter because the very fine colloidal particles directly pass through a paper filter. To facilitate the filtration, the colloidal suspension must be first flocculated by adding a concentrated solution of salt to the system.
