14Dynamic Equilibria Equilibrium ConstantsMedium1 markEthanoic acid dissociates in water.CH3COOH+H2O⇌CH3COO−+H3O+ΔH=−2kJ mol−1Which change causes the pH of this aqueous solution to decrease?Aadding a catalystBdissolving a small amount of potassium hydroxide into the mixtureCdecreasing the temperatureDdissolving a small amount of sodium ethanoate into the aqueous ethanoic acidGrade answerSolutionGrading criteria