Equilibrium Constants Last updated Save as PDF Page ID9390 E1: Acid Dissociation Constants at 25°CE2. Base Dissociation Constants at 25°CE3. Solubility Constants for Compounds at 25°CE4: Complex Ion Formation ConstantsE4a: Stepwise Association ConstantsE5: Acid Dissociation Constants of OrganicsE6: Activity Coefficients at 25°C