Using the Henderson-Hasselbalch equation, you want to figute out if the pKa of acetic acie will change based on how mucj sodium hydroxide you put in. Let’s say you put in 1 mL of NaOH and found the pH to be 3 (now understand thathtis isn’t a simple acid/base reaction). The equivalence point was at 5 mL. What would be the ratio of base to acid in this case?