Buffer Solution Calculator

A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base (or a weak base and its conjugate acid) in equilibrium. Buffer solutions are essential in many chemical and biological processes.

Enter the pKa value of your weak acid, the concentration of the acid [HA], and the concentration of its conjugate base [A⁻]. Choose your preferred concentration unit (mol/L or mmol/L). Click "Calculate pH" to get the pH of your buffer solution.

The Henderson-Hasselbalch equation (pH = pKa + log([A⁻]/[HA])) relates the pH of a buffer solution to the pKa of the weak acid and the ratio of concentrations of the conjugate base to the acid. This equation is fundamental in understanding buffer behavior and pH calculations.

Buffer solutions are crucial in various fields including biochemistry, medicine, and industrial processes. They maintain stable pH in biological systems, are used in drug formulations, and are essential in chemical manufacturing and quality control.