The minimum amount of an electrolyte required to cause coagulation of a sol is called: (a) Coagu

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The minimum amount of an electrolyte required to cause...

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Key Concepts

Coagulation Value

This is defined as the minimum concentration of an electrolyte required to destabilize a colloidal sol by neutralizing the repulsive forces between the charged particles, leading to their aggregation or coagulation. It is a critical parameter in colloidal chemistry as it helps in understanding the stability of colloidal dispersions and the conditions under which they can be induced to coagulate or precipitate.

Colloidal System

A colloidal system consists of small, dispersed particles (typically ranging in size from 1 to 1000 nanometers) distributed in a continuous medium. The stability of these systems is maintained by repulsive forces, and their behavior under various conditions, such as the addition of electrolytes, is an important area of study in physical chemistry.

Electrolyte

Electrolytes are substances that, when dissolved in a solvent, dissociate into ions. In the context of colloidal systems, the addition of an electrolyte can screen or compress the electrical double layer surrounding the colloidal particles, diminishing the repulsive forces and thereby facilitating aggregation or coagulation. The precise electrolyte concentration required to cause this effect is known as the coagulation value.

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