Colloids and Emulsion

Disintegration or Dispersion method Whatever may be the technique the method consists in disintegrating or pulverizing a large form of the substance to colloidal dimension…

Sulphur Sol (oxidation): Preparation Sulfur sols are colloidal solutions of elemental sulfur or of sulfur-rich compounds. Sulphur sols can be prepared by the oxidation of H2S…

Ferric hydroxide sol (hydrolysis) THEORY: Ferric hydroxide forms a lyophobic sol with water which is the dispersion medium. It is prepared by the hydrolysis of…

Gold sol (reduction) This sol is of particular interest since it is the earliest sol prepared and studied. It was known well before Graham’s definition…

Arsenious sulphide sol (double decomposition) Preparation By double decomposition, a sol of arsenic sulphide is obtained by passing hydrogen sulphide through a cold solution of…

Silver Bromide Sol (double decomposition) Preparation A very dilute solution of silver nitrate is prepared in subdued light and any suspended impurity is carefully removed…

Sol and its Preparation A sol is a dispersion of solid particles in a liquid medium. If the liquid is water it is called hydrosol,…

Disperse Phase and Dispersion Medium The material body which is present in a state of fine discrete particles is called the disperse phase and the…

Types of Colloids A colloid is one of the three primary types of mixtures, with the other two being a solution and suspension. A colloid…

Crystalloids and Colloids Graham divided all substances in solution into two classes: (i) Crystalloids, like sodium chloride, sugar etc. which diffused rapidly and easily, passed…