Here’s a explanation of the difference between adsorption and absorption:
1. Adsorption
- Definition: When particles (atoms, ions, or molecules) stick only on the surface of a solid or liquid.
- Key point: Surface phenomenon
- Example: Charcoal absorbing gases, activated carbon in water purification.
2. Absorption
- Definition: When particles spread throughout the whole volume of a solid or liquid.
- Key point: Bulk phenomenon
- Example: Water absorbed by a sponge, gases dissolving in liquids.
Simple tip:
- Adsorption → surface only
- Absorption → entire material