How to use the Henderson-Hasselbalch equation with unknown volume?

Sourav PanApril 24, 2025

Answered

If the volume is unknown but constant for both components, use the ratio of moles instead of concentrations: pH = pKa + log10(nA⁻/nHA), where nA⁻ and nHA are the moles of conjugate base and acid, respectively.

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