Chapter 9, Problem 9.116E

a. Calculate the pH of a buffer that is $0.1\text{M}$ in lactic acid, ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}\left(\text{OH}\right)\text{COOH}$, and $0.1\text{M}$ in sodium lactate, ${\text{C}}_{\text{2}}{\text{H}}_{\text{4}}\left(\text{OH}\right)\text{COONa}$.

b. What is the pH of a buffer that is $1\text{M}$ in lactic acid and $1\text{M}$ in sodium lactate?

c. What is the difference between the buffers described in parts a and b?