Henderson-Hasselbalch Equation

Definition

The Henderson-Hasselbalch equation is a mathematical formula used to calculate the pH of a solution given the pKa (acid dissociation constant) and the ratio of the concentrations of the acid and its conjugate base.

Related terms

pH:

A measure of acidity or alkalinity in a solution, where lower values indicate higher acidity and higher values indicate more alkalinity.

pKa:

A measure that indicates the strength of an acid in solution; lower values mean stronger acids.

Buffer Solution:

A solution that resists changes in pH when small amounts of an acid or base are added; it's made up from a weak acid and its conjugate base.