Question

1) Determine the pH of a buffered solution containing 0.12 M chloroacetic acid and 0.24 M sodium chloroacetate. The pKa of chloroacetic acid at 25°C is 2.89.

2) Benzoic acid (HC₇H₅O₂) is an organic acid with a K_a value of 6.3 ✕ 10⁻⁵. Calculate the pH of a buffer containing 0.082 M benzoic acid and 0.14 M sodium benzoate (NaC₇H₅O₂).

Answer 1