Henderson-Hasselbalch equation

The Henderson and Hasselbalch equation describes the relationship between buffer composition and its acidity. Under simplifying assumptions:

$\mathrm {pH} =\mathrm {p} K_{A}+\log {\frac {c_{\mathrm {B} }}{c_{\mathrm {A} }}}$ ,

where

pH is the resulting pH of the buffer,

pKA is the dissociation constant of the conjugate acid of the buffer,

c_A and c_B are the equilibrium concentrations of the conjugate acid and base forming the buffer.

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