Lecture 17 (2/21/13)
• CommonIon Effect:
o Commonion Effect:
Shift in position of an equilibrium caused by addition of an ion
involved in the reaction.
H2CO 3aq) ⇌ H (aq) + HCO 3aq)
Adding NaHCO :3
• Presence of HCO 3aq) would shift carbonic acid
equilibrium to the left, decrease ionization.
• HendersonHasselbalch Equation: