autoprotolysis constant

autoprotolysis constant

[‚ȯd·ō·prə′täl·ə·səs ′kän·stənt]
(chemistry)
A constant denoting the equilibrium condition for the autoprotolysis reaction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
As far as autoprotolysis constant (N,N- dimethyl formamide (pKs = 18.0) Greater than acetonitrile (pKs = 33.0) Greater than isopropyl alcohol (pKs = 20.6) Greater than t-butyl alcohol (pKs = 22.0)), all compounds show the weakest acidic properties in N,N-dimethyl formamide, isopropyl alcohol and t-butyl alcohol but show the strongest acidic properties in acetonitrile.
The autoprotolysis constant of AN is very low: [pK.sub.auto] [greater than or equal to] 33 [22] (even values of [pK.sub.auto] as high as 44 have been suggested [16, 23]), which makes it a good differentiating solvent.
TABLE 1: The autoprotolysis constants ([K.sub.ap]) obtained for various water-solvent mixtures.