Answer: Coagulating power of an electrolyte is the minimum amount of electrolyte in millimoles that must be added to one litre of a colloidal solution to bring about its coagulation.

What is coagulating power or flocculating power?

Hint: Flocculating value or the coagulating value is the amount of the electrolyte which is needed so that 1 litre of colloidal solution precipitates easily. The coagulating power or flocculating power is the reciprocal of coagulating value or flocculating value.

What is a coagulating value?

The minimum concentration of an electrolyte which is required to cause coagulation is known as coagulating value of sol. It is usually expressed in terms of milli-moles per litre. Coagulation power is inversely proportional to coagulation value.