Ethanoic acid and ethanoate ions form an equilibrium as shown below:

CH3COOH (aq) + H2O (l) ↔ CH3COO- (aq) + H3O+ (aq)

Which solution would increase the concentration of the ethanoate ions, when added to the equilibrium mixture?


Sodium hydroxide


Sodium chloride


Sodium nitrate


Hydrochloric acid