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?
(i) In multi-molecular colloids, the colloidal particles are
an aggregate of atoms or small molecules with a diameter of less than
1 nm. The molecules in the aggregate are held together by van der
Waal’s forces of attraction. Examples of such colloids include
gold sol and sulphur sol.
(ii) In macro-molecular colloids, the colloidal particles are
large molecules having colloidal dimensions. These particles have a
high molecular mass. When these particles are dissolved in a liquid,
sol is obtained. For example: starch, nylon, cellulose, etc.
(iii) Certain substances tend to behave like normal
electrolytes at lower concentrations. However, at higher
concentrations, these substances behave as colloidal solutions due to
the formation of aggregated particles. Such colloids are called
aggregated colloids.
(i) In multi-molecular colloids, the colloidal particles are an aggregate of atoms or small molecules with a diameter of less than 1 nm. The molecules in the aggregate are held together by van der Waal’s forces of attraction. Examples of such colloids include gold sol and sulphur sol.
(ii) In macro-molecular colloids, the colloidal particles are large molecules having colloidal dimensions. These particles have a high molecular mass. When these particles are dissolved in a liquid, sol is obtained. For example: starch, nylon, cellulose, etc.
(iii) Certain substances tend to behave like normal electrolytes at lower concentrations. However, at higher concentrations, these substances behave as colloidal solutions due to the formation of aggregated particles. Such colloids are called aggregated colloids.
