Buffer Solution Calculator
Buffer Solution
Calculate the amounts of acid and conjugate base needed to prepare a buffer at a target pH
pH
pKa
M
mL
Formula
pH = pKa + log(Base Concentration / Acid Concentration)
Frequently Asked Questions
What is the Henderson-Hasselbalch equation?
The Henderson-Hasselbalch equation is pH = pKa + log([A-]/[HA]), which relates the pH of a buffer solution to the pKa of the weak acid and the ratio of conjugate base to acid concentrations.
What is buffer capacity?
Buffer capacity is the ability of a buffer to resist pH changes. A buffer works most effectively within one pH unit above and below the pKa of its weak acid component.