What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids?
What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids?
Multimolecular colloids These are formed when a large number of atoms or smaller molecules of a substance aggregate together to form a species having the size in the colloidal range e.g., gold sol, sulphur sol (S8).
Macromolecular colloids These are obtained on the dissolution of a macromolecule in a suitable solvent to convert it into colloidal range. These are quite stable and resemble true solutions in many respect. e.g, cellulose, protein etc.
Associated colloids These colloids behave as strong electrolytes at lower concentrations but at higher concentrations behave as colloids due to the formation of aggregates, called micelles. Colloidal behaviour is exhibited by them only above a particular temperature, called kraft's temperature and a particular concentration called, Critical Micelle Concentration (CMC). e.g., soaps and synthetic detergents.
Multimolecular colloids These are formed when a large number of atoms or smaller molecules of a substance aggregate together to form a species having the size in the colloidal range e.g., gold sol, sulphur sol (S8).
Macromolecular colloids These are obtained on the dissolution of a macromolecule in a suitable solvent to convert it into colloidal range. These are quite stable and resemble true solutions in many respect. e.g, cellulose, protein etc.
Associated colloids These colloids behave as strong electrolytes at lower concentrations but at higher concentrations behave as colloids due to the formation of aggregates, called micelles. Colloidal behaviour is exhibited by them only above a particular temperature, called kraft's temperature and a particular concentration called, Critical Micelle Concentration (CMC). e.g., soaps and synthetic detergents.
