Explain how a buffer system works using the following
a. pH of 20.0 mL of water before and after the addition of 2.0 mL 0.10 M NaOH
b. pH of 20.0 mL of water before and after the addition of 2.0 mL 0.10 M HCl
c. pH of 20.0 mL of 0.10M acetic acid/sodium acetate buffer before and after the addition of 2.0 mL of 0.10 M NaOH; 2.0 mL 0.10 M HCl