What is the pH of a buffer solution that is 0.255 M in hypochlorous acid (HClO)and 0.333 M in sodium hypochlorite? The K_a of hypochlorous acid is 3.8 × 10^-8. A)13.88 B)6.46 C)8.49 D)7.30 E)7.54

Question

Quizplus · Accepted Answer

The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]). Here, pKa = -log(3.8 × 10^-8) = 7.42. Plugging in the concentrations, pH = 7.42 + log(0.333/0.255) = 7.54.

What Is the PH of a Buffer Solution That Is