⚡ pH and Acid-Base Equilibrium
pH, pOH, Ka, Kb, ionization degree and buffers
Enter any of the four values — the rest are calculated using Ka × Kb = Kw = 1×10⁻¹⁴ at 25 °C.
ConstantValuep-Value
Ka
Kb
Kw
1.0 × 10⁻¹⁴
pKw = 14.00
pH = pKa + log([A⁻] / [HA])
Calculate pH
Calculate ratio
What [A⁻]/[HA] ratio do I need to reach this pH?