A small quantity of each of the following is added to separate samples of an aqueous solution of ethanoic (acetic) acid. Which would leave the lowest concentration of ethanoate (acetate) ions?
- sodium hydrogen carbonate solution
- dilute hydrochloric acid
- dilute sodium hydroxide solution
The Attempt at a Solution
I chose 2) dilute HCl solution because the reaction of ethanoic acid dissociation is:
CH3COOH ↔ CH3COO- + H+.
If HCl was added, there will be more H+ present so therefore the equilibrium would shift to the left and decrease the concentration of ethanoate ions. Is this correct?