Buffer capacity (acidic buffer) (β ≈ 2.303 × [HA][A-]/([HA]+[A-]))
jee-mainjee-advancedneet-ug
β ≈ 2.303 × [HA][A-]/([HA]+[A-])
What each symbol means
| Symbol | What it stands for |
|---|---|
| β | Buffer capacity (mol L⁻¹ per pH unit) — resistance to pH change |
| [HA],[A^-] | Equilibrium concentrations of acid and conjugate base |
When to use this
Weak acid/conjugate base buffer; approximate for moderate concentrations; maximum near pH = pKa when [HA]=[A-].