Question 1
What is the pH at the equivalence point for the titration of 0.20 M aqueous nitrous acid by 0.20 M aqueous sodium hydroxide?
Ka for nitrous acid is 4.5 × 10
-4◦ 5.83
◦ 7.00
◦ 8.17
◦ 9.00
◦ 10.67
Question 2
What is the pH at the equivalence point of a weak base-strong acid titration if 20.00 mL of NaOCl(aq) requires 28.30 mL of 0.50 mol L
-1 HCl(aq) for complete neutralization?
Ka = 3.0 × 10
-8 for HOCl.
◦ 0.30
◦ 3.18
◦ 3.76
◦ 4.03