2. Definition of pKa in aqueous media

2.1 pKa and Brønsted-Lowry acids and bases

Let's recall very briefly that, according to Brønsted-Lowry theory, an acid is a substance capable of yielding a proton to another substance which, possessing the property of capturing a proton, is by definition a base. Let HA be the acid studied, dissolved in water. The following equilibrium is established:

The species H ₃ O ⁺ symbolizes the proton solvated by water (the representation...

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Definition of pKa in aqueous media

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Bibliography

(1) - LEWIS (G.N.) - Outlines of a new system of thermodynamic chemistry. - Proc. Am. Acad., 43, p. 259 (1907).
(2) - IUPAC - Quantities, units and symbols in physical chemistry. - 2 ^nd edition, Blackwell...