The percent dissociation of acetic acid changes as the concentration of the acid decreases.A 100-fold decrease in acetic acid concentration results in a ________ fold ________ in the percent dissociation.

Question

Quizplus · Accepted Answer

The percent dissociation of weak acids like acetic acid increases as the concentration decreases. This is because the dissociation of acetic acid in water is an equilibrium process, and according to Le Chatelier's principle, decreasing the concentration of the acid shifts the equilibrium towards more dissociation to increase the concentration of the acid. A 100-fold decrease in concentration significantly increases the percent dissociation, but the relationship is not directly proportional, making a 10-fold increase in percent dissociation a reasonable approximation.

The Percent Dissociation of Acetic Acid Changes as the Concentration