Question 1
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C
6H
5CO
2H) and 0.15M sodium benzoate (C
6H
5COONa). [K
a = 6.5 × 10
–5 for benzoic acid]
◦ 3.97
◦ 4.83
◦ 4.19
◦ 3.40
◦ 4.41
Question 2
Calculate the pH of a solution that is 0.410 M in HOCl and 0.050 M in NaOCl. [K
a(HOCl) = 3.2 × 10
–8]
◦ 0.39
◦ 3.94
◦ 6.58
◦ 7.49
◦ 8.40