1 2 3 4 5 6 7 Acetic Acid 18 mL 15 mL 12 mL 9 mL 6 mL 3 mL 0 mL Acetate 0 mL 3 mL 6 mL 9 ml 12 mL 15 mL 18 mL Buffer pH 3.41 pH with HCl 2.

Average pKa  = 7.74 of acetic acid .

What is the observed effective pH buffering range for inital acetate buffers?

Which mixtures of acetate buffer resist pH changes to BOTH HCl and NaOH? How did you decide? Which would be the best buffer solution against added acid and base? Why?