Question 1
What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid requires 29.80 mL of 0.0567 M NaOH?
Ka = 1.8 × 10
-4 for formic acid.
◦ 8.12
◦ 11.54
◦ 2.46
◦ 5.88
Question 2
What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous hydrofluoric acid requires 30.00 mL of 0.400 M NaOH?
Ka = 6.76 × 10
-4 for HF.
◦ 8.25
◦ 12.26
◦ 1.74
◦ 5.75