Question 5
a) How many mL of 0.1 M CH3COONa must you add to 35.0 mL of 0.50M CH3COOH to make a buffer of pH 4.7? [pKa of H3COONa is 4.75]
b) Use the Henderson-Hasselbalch equation to calculate how manymL of 0.1 M HCl must you add to 100 mL of 0.10 M Tris base to makea buffer of pH 8.8? [pka of Tris Base is 8.08]
c) What is the pH when 25.0 mL of 0.200 M of CH3COOH has beentitrated with 35.0 mL of 0.100 M NaOH? Write out the balancedchemical equation.
d) *You need to produce a buffer solution thathas a pH of 4.68. You already have solution that contains 15.0 mmolof CH3COOH. How many millimoles of CH3COONa should you add to thissolution?
