Henderson–Hasselbalch equation

https://doi.org/10.1351/goldbook.H02781
An equation of the form: \[\text{pH} = \text{p}K_{\text{a}}- \log _{10}(\frac{\left[\text{HA}\right]}{\left[\text{A}^{-}\right]})\] for the calculation of the \(\text{pH}\) of solutions where the ratio \(\frac{\left[\text{HA}\right]}{\left[\text{A}^{-}\right]}\) is known.
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1120 [Terms] [Paper]
Citation: 'Henderson–Hasselbalch equation' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.H02781 RIS BibTex EndNote
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Last revised: February 24, 2014