Henderson-Hasselbalchova enačba

Henderson-Hasselbalchova enáčba [hénderson háselbalhova ~] podaja zvezo med razmerjem deležev protolizirane in neprotolizirane šibke kisline ali baze ter razliko med pH in konstanto kisline (pK_a ) oziroma konstanto baze (pK_b ).

Za šibke kisline (HA) velja:

pK_{a}-pH=\log _{10}{\frac {[HA]}{[A^{-}]}}

Za šibke baze (B) velja:

pK_{b}-pOH=\log _{10}{\frac {[HB^{+}]}{[B]}}

Literatura

Lawrence J. Henderson. Concerning the relationship between the strength of acids and their capacity to preserve neutrality. Am. J. Physiol. 1908, 21, 173-179. (COBISS)
Hasselbalch, K. A. Biochemische Zeitschrift 1916, 78, 112-144.
Po, Henry N.; Senozan, N. M. Henderson-Hasselbalch Equation: Its History and Limitations. J. Chem. Educ. 2001, 78, 1499-1503. (COBISS)
de Levie, Robert. The Henderson-Hasselbalch Equation: Its History and Limitations. J. Chem. Educ. 2003, 80, 146.