Explanation on Colloids

As lyophilic sols, stable colloids have strong forces of interaction between the dispersed phase and the dispersion medium. Lyophilic sols are a type of stable colloidal suspension. These are made using the methods listed below that are appropriate for the situation:

Colloids are being purified

Colloids contain ionic impurities as well as other types of impure substances, which degrade the quality of colloids used in a variety of applications and reduce their effectiveness. Listed below are the procedures for purifying the colloids.

Dialysis is a procedure that removes waste from the body

It is possible to separate ionic substances from colloidal solution through the use of effusion through a suitable membrane, which is known as dialysis. Based on the fact that impurities slowly diffuse out of the base, leaving pure colloid, sol particles are unable to pass through parchment paper or semipermeable membranes.

Care should be taken to ensure that crystalloids are not accumulating in the distilled water in which the bag is immersed. If this is not done, there is a risk of impurities diffusing back into the bag from the container.

Electro Dialysis is a type of dialysis that uses electricity

Dialysis is a time-consuming process that requires a significant amount of time to remove impurities. The process is improvised as a result of the application of electrical force. This procedure is referred to as electrodialysis. This method involves the use of two electrical plates that are inserted into distilled water and connected to the source’s terminals. When the long moves to the opposite electric plate at a faster rate, the water is purified.

Ultrafiltration (also known as ultrafiltration)

In order to filter the impurities from colloids, ordinary filter papers cannot be used because, due to the large size of their pores, both the impurities and the sol particle are filtered off with them. The pore size of the papers is reduced by impregnating them with a collodion solution that is 4 – s in concentration. Calculate the concentration of nitrate solution in an alcohol–ether mixture that has been dried with acetaldehyde. Ultrafiltration is the term used to describe this process, and such papers are referred to as ultrafilter papers.

Good examples of Colloids are

A respiration pigment containing albumin protein in water, blood is a respiration pigment. Albumin is present in the pigment part, which serves as the dispersed phase, and water serves as the dispersion medium. It is in fact a hydrosol.

Cloud: It is composed of air, which serves as the dispersion medium, and water droplets, which serve as the dispersed phase. Aerosols are what these are.

It is a metallic sol in which gold particles are dispersed in water, and it is used to make gold jewellery.

Colloids Have a Wide Range of Applications

Colloids are widely used in a variety of industries, medical settings, and domestic settings.

Syrup, halwa, and soup are examples of food items that belong to a colloidal type of system.

Medicine: Colloidal silver, also known as Argyrols, is an antiseptic that can be used to treat eye infections.

The Cottrell precipitator is used to purify the air.

The coagulation of solution particles is the process involved in this procedure. During the passage of dust or smoke through the inlet of an electrified chamber, which has a central electrical plate that is charged in the opposite direction of the charge applied to a dent or smoke particle, the particles coagulate and pure air is passed through another outlet.

Sols that are lyophilic

These are very strong and stable sols. There is a strong interaction between the dispersed phase and the dispersion medium in this situation. The following are some of the characteristics of lyophilic sols:

• Surface tension is lower than the tension of the medium in question.
• Viscosity: It is higher than the medium range.
• Reversibility: These are sols that can be reversed. When the dispersion medium is evaporated and the solvent is re-added, the same type of sol is formed as the first time around.
• Stability: Because of the strong interaction between the dispersed phase and the dispersion medium, the dispersed phase is more stable.
• Visibility: When viewed under an electron microscope, the particles are visible.

An electrolyte solution is required for the formation of sol, but only a small amount of electrolyte is required.

Conclusion

During the tanning of leather process, animal skins are immersed in a solution of tannin, which has the opposite charge to that of the animal skin, particles are coagulated and the skin becomes hard; this is known as tanning of leather.

Delta formation is characterised by the coagulation of clay particles from the river with an electrolyte derived from seawater.