Chemistry
Buffer pH (Henderson-Hasselbalch)
Calculate pH of an acidic buffer.
pH = pKa + log([Salt]/[Acid])
Formula Explanation
The Henderson-Hasselbalch equation gives pH of a buffer solution.
Variables Explained
pKa = -log Ka; [Salt] and [Acid] = concentrations.
Solved Example
pKa = 4.74, [Salt]/[Acid] = 1. Find pH.
pH = 4.74 + log1 = 4.74.