Question

Give two differences between macromolecular colloids and associated colloids.

Answer 1

Colloids or colloidal solutions are mixtures in which the colloidal particles of the range 1 to ${10^9}$ nanometres remain disposed in the dispersion medium.

Complete step by step answer:
We need to give two differences between macromolecular colloids and associated colloids.
First let us try to understand colloids. Colloids are mixtures in which microscopically dispersed insoluble particles of one substance remain suspended in another substance. The size of the suspended particle in colloids can range from 1 to ${10^9}$ nanometers. The phase that is dispersed in colloidal particle shape is called the dispersed phase. While, the medium in which colloidal particles are distributed is called dispersion medium. Example: Starch represents the dispersed phase in a starch solution, while water is the dispersion medium.
It is very important to note that colloidal systems can offer in any of the three key states of matter – gas, liquid or solid. However, a colloidal solution usually refers to a liquid concoction.
Macromolecular colloids and associated colloids are different types of colloidal system and the two differences between them are as follows –

1. Macromolecular colloids consist of macromolecules having size in the colloidal range, example – Protein, whereas associated colloids are formed by aggregation of particles at higher concentration to the colloidal range. Soap is an example of associated colloids.
2. Macromolecular colloids are mostly lyophilic colloids whereas associated colloids are a combination of lyophobic and lyophilic colloids.

Note:
Students should understand that associated colloids, also called micelles, are generally electrolytes. They exist as ions at low concentration. It is above a particular concentration called critical micelle concentration (CMC) and above a temperature called Kraft temperature; these get associated and exhibit colloidal behavior. It is very important to note that the primary distinguishing features between a true solution and a colloidal solution is fundamentally the dimension of the constituent part.