Posted: December 7th, 2016

Calculate the expected pH values of the buffer systems from the experiments (a, b, c, d) using the Henderson-Hasselbalch equation (pH= pKa + log [A-] ).

Calculate the expected pH values of the buffer systems from the experiments (a, b, c, d) using the Henderson-Hasselbalch equation (pH= pKa + log [A-] ). Use for pKa values: carbonic acid= 6.37 and acetic acid= 4.75.

[HA]

a. 5 mL 0.1 M CH3COOH + 5 mL 0.1 M CH3COO-Na+

b. 1 mL 0.1 M CH3COOH + 10 mL 0.1 M CH3COO-Na+

c. 5 mL 0.1 M H2CO3 + 5 mL 0.1 M NaHCO3

d. 1 mL 0.1 M H2CO3 + 10 mL 0.1 M NaHCO3