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Charcoal adsorption experiment What is the adsorption effect of charcoal?

Charcoal has a large number of micropores and transition pores, which not only has a high specific surface area, but also has good adsorption performance after the tar substances in the pores are excluded. The adsorptive properties of charcoal also make it widely used. Today, we will use some simple chemistry experiments to understand the adsorption properties of charcoal.
1. The purpose of the experiment.
To verify the adsorption of charcoal; to learn basic experimental operations such as the taking of substances, the use of plastic tip droppers, and oscillation.
Second, the experimental principle.
Adsorption is a complex surface phenomenon that occurs at the interface of solid, liquid and gas two-phase, and it is a heterogeneous process. Most adsorption processes are reversible, and the molecules or atoms in the liquid or gas phase are transferred to the surface of the solid phase, increasing the concentration of substances on the surface of the solid phase, which is called adsorption.
Charcoal adsorption is the use of charcoal solid surface to adsorb one or more substances in water to achieve the purpose of purifying water quality.
3. Experimental equipment.
Erlenmeyer flask, charcoal, glue tip dropper, tweezers, red ink, water.
Fourth, the experimental steps.
1. Put half a bottle of water into a small conical flask and drop a drop of red ink. Observe that the red ink gradually spreads out and the water in the conical flask turns red.
2. Put a few pieces of charcoal or activated carbon into a small conical flask and shake. Activated carbon is a specially treated carbon with a developed special pore structure. Large specific surface area, special surface chemical properties, and strong adsorption capacity of activated carbon.
Observation phenomenon: The red water in the conical flask gradually becomes clear, the red color disappears, and the red ink charcoal or activated carbon in the water is adsorbed.


Post time: Apr-24-2022