How much 5.70M NaOH must be added to 620.0 mL of a buffer that is 0.0195 M acetic acid and 0.0230 M sodium acetate to raise the pH to 5.75? b. Calculate the change in pH when 53.0 mL of a 0.580 M solution of NaOH is added to 1.00 L of a solution that is 1.00 M in sodium acetate and 1.00 M in acetic acid