Question

derive ostwald dilution law for acetic acid

Answer 1

Ostwald’s dilution law is the application of the law of mass action to weak electrolytes in solution. Suppose an acid HA is dissolved in water, it will ionise as under:



Applying law of mass action,



Where  is the dissociation (or ionisation) constant of the acid HA and  is its degree of dissociation.

This equation is known as Ostwald’s dilution law equation. If   then the above equation may be written as: