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Write the use of adsorption

Posted by Lav Kumar 6 years, 3 months ago

CBSE > Class 12 > Chemistry

4 answers

K@Łp@N@ $Øđh!?? 6 years, 3 months ago

Importance or Applications of Adsorption: (1) In the preparation of gas masks using activated charcoal to avoid poisonous gases like etc. (2) Froth floatation method used for concentration of sulphide ores is based on adsorption. (3) Silica gel can be used to remove moisture and to control humidity.

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Lav Kumar 6 years, 3 months ago

Thanks

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Yogita Ingle 6 years, 3 months ago

Production of high vacuum- Remaining traces of air in a vessel already evacuated by vacuum pump can be adsorbed by charcoal to create high vacuum
Control humidity - Silica and aluminium gels can adsorb moisture and remove humidity
Gas masks- Gas masks consist of activated charcoal or mixture of adsorbents and are used to breathe in coal mines
Removing coloured substances from solutions- This is used in chromatographic analysis.
Separation of inert gases- Different inert gases are adsorbed to different extents on coconut charcoal
Heterogeneous catalysis- When gaseous reactants are adsorbed on the surface of a solid catalyst, the concentration of the reactants on the surface increases and thus, the rate of reaction also increases( adsorption theory). Eg- Using finely divided Nickel in the hydrogenation of vegetable oils

Adsorption indicators- Many dyes have become useful due to adsorption. These dyes have been introduced as indicators especially in precipitation titrations. Eg- KBr is easily titrated with AgNO3 using eosin as the indicator

Froth floatation process- When sulphide ore is shaken with pine oil and water, the ore particles are adsorbed on the froth that floats and the gangue prticles ( like silica, mud) settle down in the tank. This process is used in the concentration of sulphide ores
Chromatographic analysis- The selective adsorption of some substances by a solution helps us separate components of a mixture. Example- All the dyes in ink
Curing Diseases- Some drugs can adsorb the germs on them and hence, kill them saving us from diseases

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