Question

What is sorption? Give an example.

Hint:

Sorption = Adsorption + Absorption; it is common in porous solids and biological systems.

Answer 1

Step 1: Definition.
Sorption is a general term that refers to the simultaneous process of both adsorption and absorption taking place together.
Step 2: Explanation.
- Adsorption: The accumulation of molecules only on the surface of a solid or liquid.
- Absorption: The penetration of molecules into the bulk of a material.
When both these processes occur at the same time, the phenomenon is called sorption.
Step 3: Example.
Activated charcoal, when exposed to a dye solution, first adsorbs dye molecules on its surface and then some dye also diffuses inside its pores — this combined effect is called sorption.
Step 4: Real-life analogy.
Clothes dipped in water absorb and adsorb water molecules simultaneously — another example of sorption.