posted by chem .
You need to produce a buffer solution that has a pH of 5.08. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The of acetic acid is 4.74.
Use the Henderson-Hasselbalch equation. pKa = 4.74. mmols acetic acid = 10. You want pH =n 5.08. Solve for Base.