What Is Coagulation Value

Coagulation value is the millimoles of an electrolyte that must be added to 1 L of a colloidal solution for complete coagulation. The phenomenon of the precipitation of a colloidal solution by the addition of the excess of an electrolyte is called coagulation or flocculation.

What is meant by coagulation value?

“The minimum concentration of electrolyte in millimoles required to cause coagulation of one litre of colloidal solution is called coagulation value”.

How is coagulation value calculated?

“The minimum concentration of an electrolyte that is required to cause the coagulation or flocculation of a sol is known as flocculation value.” It is expressed in terms of millimoles per litre. 2 mL of 1 M NaCl contains 2 / 1000 mol = 2 millimole.