Question

What is difference between absorption and adsorption

Answer 1

Explanation:

Absorption is the process in which a fluid is dissolved by a liquid or a solid (absorbent). Adsorption is the process in which atoms, ions or molecules from a substance (it could be gas, liquid or dissolved solid) adhere to a surface of the adsorbent. Adsorption is a surface-based process where a film of adsorbate is created on the surface while absorption involves the entire volume of the absorbing substance.

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Answer 2

Answer:

Adsorption

• 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.  

Absorption:

• The process of absorption is a bulk phenomenon.
• In absorption, the substance gets uniformly distributed throughout the bulk of the solid or liquid.