Consider the ionization of acetic acid as follows:CH ₃COOH + H₂ O H₃O + + CH₃COO 1 - What is the effect of adding the common ion, acetate, CH₃COO - (source:
CH₃COONa), to this equilibrium system?

Question

Consider the ionization of acetic acid as follows:CH ₃COOH + H₂ O  H₃O + + CH₃COO 1 - What is the effect of adding the common ion, acetate, CH₃COO - (source:
CH₃COONa), to this equilibrium system?

Quizplus · Accepted Answer

Adding the common ion, CH₃COO-, to the system will increase the concentration of the acetate ion, which is a product of the reaction. According to Le Chatelier's principle, increasing the concentration of a product will cause the equilibrium to shift left, towards the reactants. As a result, the concentration of H₃O+ will decrease, causing the pH to rise.

Consider the Ionization of Acetic Acid as Follows:CH ₃COOH