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Acidity constant (268 words) |
 | In chemistry or biochemistry, the acidity constant or acid dissocation constant () is a specific type of dissociation constant that indicates the extent of dissociation of hydrogen ions from an acid. |
| An acid with an acidity constant near 1 is almost completely dissociated when dissolved in water; conversely, an acid with an acidity constant near 0 remains almost completely undissociated. |
| Because this number varies over many degrees of magnitude, the acidity constant is often represented by the inverse of its common logarithm, represented by. |
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