Question

Is aqueous solution of Sodium lauryl sulphate a macromolecular colloid?

Answer 1

Types of Colloids:

1. Multimolecular colloids are formed when a large number of big atoms or small molecules with a diameter less than 1 nm combine in such a way that their overall size falls within the size range of the Colloidal solution. Example Sulfur solutions.
2. The macromolecules create a solution with a suitable solvent in this type of colloid. The particles in this macromolecular solution are in the colloidal particle size range.
3. As a result, the macromolecular colloid is a term used to describe this solution. Example Starch, synthetic rubber
4. Some compounds are powerful electrolytes when present in little amounts, but when present in high concentrations, they become colloidal solutions and form micelles or aggregations.
5. Associated colloids are another name for them. Example Detergents and soaps.
6. Sodium lauryl sulfate is a lengthy chain of hydrocarbons with a formula ${\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_{11}{\mathrm{SO}}_4{\mathrm{Na}}^{+}$ that functions similarly to soaps.
7. It also forms micelles or aggregate particles when dissolved in a higher concentration in water.

Therefore, Sodium lauryl sulfate is not a macromolecular colloid but an associated colloid.