Question

what is the difference between absorption and adsorption? explain with the example?​

Answer 1

Answer:

Absorption is a physical or chemical effect or a mechanism in which electrons, molecules or ions join some bulk phase – solid or liquid substance. ... Adsorption is based on the surface where a film of adsorbate is developed on the surface, and absorption includes the complete volume of the absorbing agent.

Answer 2

Answer:

• Adsorption is a surface phenomenon of accumulation of molecules of a substance at the surface rather than in the bulk of a solid or liquid.
• The substance that gets adsorbed is called the ‘adsorbate’ and the substance on whose surface the adsorption takes place is called the ‘adsorbent’.
• Here, the concentration of the adsorbate on the surface of the adsorbent increases.
• In adsorption, the substance gets concentrated at the surface only.
• It does not penetrate through the surface to the bulk of the solid or liquid.
• For example, when we dip a chalk stick into an ink solution, only its surface becomes coloured.
• If we break the chalk stick, it will be found to be white from inside.  
• On the other hand, the process of absorption is a bulk phenomenon.
• In absorption, the substance gets uniformly distributed throughout the bulk of the solid or liquid.