In 0.100 M HC₂H₃O₂(aq),[H₃O⁺(aq)] = [C₂H₃O₂^-(aq)] = 1.3 × 10^-3 M.If a few drops of concentrated HCl(aq)are added to this solution,the C₂H₃O₂^-(aq)concentration is: A) 1.3 × 10^-3 M C)= 1.3 × 10^-3 M D)0.100 M

Question

In 0.100 M HC₂H₃O₂(aq),[H₃O⁺(aq)] = [C₂H₃O₂^-(aq)] = 1.3 × 10^-3 M.If a few drops of concentrated HCl(aq)are added to this solution,the C₂H₃O₂^-(aq)concentration is: A)< 1.3 × 10^-3 M B)> 1.3 × 10^-3 M C)= 1.3 × 10^-3 M D)0.100 M

Quizplus · Accepted Answer

Adding concentrated HCl to the solution increases the concentration of H+ ions, shifting the equilibrium to the left according to Le Chatelier's principle, thus decreasing the concentration of $ \text{HCO}_3^- $.

In 0100 M HC2H3O2(aq),[H3O+(aq)] = [C2H3O2-(aq)] = 1

In 0100 M HC₂H₃O₂(aq),[H₃O⁺(aq)] = [C₂H₃O₂^-(aq)] = 1