Molar Volume Subject: Chemistry Molar Volume The molar volume of any substance is the volume occupied by one mole of the substance. This quantity is easily determined by dividing the molecular mass by the density of the compound. According…
Preparation of Emulsion Subject: Chemistry Preparation of Emulsion An emulsion is a dispersion of one liquid into another liquid in the form of small globules. Emulsions are generally prepared by dispersion methods. Most emulsions are prepared by mixing the two…
Importance of Colloids Subject: Chemistry Importance of Colloids The study of colloids, lyophobic, lyophilic, molecular, or colloidal electrolytes is important not only for the satisfaction of an inquisitive mind but also from the practical point of view. There is hardly…
Emulsion Subject: Chemistry An emulsion is a dispersion of one liquid into another liquid in the form of small globules. Milk is a well-known emulsion. Many oils of animal or vegetable origin are used in medicine in the…
Imbibition and Swelling Subject: Chemistry Imbibition and Swelling If some gelatin or agar is placed in water it first swells considerably and then either pass on to dispersion or remains as a gel, depending on the concentration of salt, pH…
Foam: Colloids and Emulsion Subject: Chemistry Foam A dispersion of a gas in a liquid is called Foam. Ordinary soap solutions form lather which behaves like a foam if air-bubbles entrapped into it is reduced to colloidal dimension. Sol, gel, emulsion,…
All Gels are basically Sols but all Sols are not Gels – Explain Subject: Chemistry All Gels are basically Sols but all Sols are not Gels If the sol is concentrated and the discrete particles are present in a state of bridged or cross-linked structure the system is called a…
Syneresis Subject: Chemistry Syneresis is the contraction of a gel accompanied by the separating out of the liquid. Many gels, if allowed to stand, are found to exude some water or the dispersion medium and the gel undergoes…
Peptization Subject: Chemistry Peptization is the process by which a coagulum or a precipitate is dispersed to a colloidal state. It is the reverse process of coagulation. It is the process responsible for the formation of a stable…
Electrical Double Layer Subject: Chemistry The Electrical Double Layer The electrical properties of the colloidal state of matter and other associated phenomena may be explained in terms of the existence of an electrical double layer at the interface between two…
Electrophoresis Subject: Chemistry Electrophoresis is a chromatography technique by which a mixture of charged molecules is separated according to size when placed in an electric field. A simple experiment may be carried out in order to firmly establish…
Colligative Properties of Colloids Subject: Chemistry Colligative Properties All molecular colloids in solution exhibit colligative properties. Since most of these colloids have high molecular masses the depression of freezing point, elevation of boiling point or lowering of vapor pressure is so…