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Acid dissociation constant - Relationship between acidity and basicity constants | | Acid dissociation constant - Relationship between acidity and basicity constants: Encyclopedia II - Acid dissociation constant - Relationship between acidity and basicity constants | | There exists a relationship between the value of Ka for an acid HA and the value of Kb for its conjugate base A–. Since adding the ionization reaction for HA and the ionization reaction of A– always gives the reaction for the self-ionization of water, the product of the acidity and basicity constants gives the dissociation constant of water (Kw), which is 1 ...
See also:Acid dissociation constant, Acid dissociation constant - Basicity constant of the conjugate base, Acid dissociation constant - Relationship between acidity and basicity constants, Acid dissociation constant - The Relative Strengths of Acids and Bases, Acid dissociation constant - pKa of some common substances | | | Acid dissociation constant, Acid dissociation constant - Basicity constant of the conjugate base, Acid dissociation constant - Relationship between acidity and basicity constants, Acid dissociation constant - The Relative Strengths of Acids and Bases, Acid dissociation constant - pKa of some common substances | | |
| | | Acid dissociation constant: Encyclopedia II - Acid dissociation constant - Relationship between acidity and basicity constants
Acid dissociation constant - Relationship between acidity and basicity constants
There exists a relationship between the value of Ka for an acid HA and the value of Kb for its conjugate base A–. Since adding the ionization reaction for HA and the ionization reaction of A– always gives the reaction for the self-ionization of water, the product of the acidity and basicity constants gives the dissociation constant of water (Kw), which is 1.0 × 10-14 M2 at 25°C. In other words,
KaKb = Kw
pKa + pKb = pKw
As the product of Ka and Kb remains constant, it follows that stronger acids have weaker conjugate bases, and vice versa.
Other related archivesAcetic acid, Acid-base reaction theories, Ammonia, Aniline, Arrhenius Theory, Benzoic acid, Bronsted-Lowry Theory, Carbonic acid, Citrate, Dimethylamine, Ethylamine, Ethylenediamine, Formic acid, Henderson-Hasselbalch equation, Hydrogen sulfide, Imidazole, M, Methylamine, Phenol, Phosphate, Pyridine, Sodium hydroxide, Succinic acid, Triethylamine, Trimethylamine, acetic acid, acid, additive inverse, ammonia, aqueous, bases, biochemistry, charge, chemical equilibrium, chemistry, chlorine, common logarithm, concentration, conjugate base, dissociation, dissociation constant, electronegativity, equilibrium constant, fluorine, hydrochloric acid, hydrofluoric acid, hydrogen ions, hypochlorous acid, iodine, ionic bond, molar, molarity, oxidation number, oxidation state, pH, perchloric acid, polarity, self-ionization of water, sodium hydroxide, strong acids, strong base, water, weak acids, weak bases
 Adapted from the Wikipedia article "Relationship between acidity and basicity constants", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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