The conductivity and dissociation of organic acids in aqueous solution at different temperatures .. . = 128). Fig. Ill—I. Benzoic acid; II. Succinic acid; III, Phenylacetic acid; IV. GaUic add Lution, they would fctll apart on increas temperature, and the fi^e acid v7ould conduct than the salt it-self. Another explanation for tho bohavior of these ariino acidsis afforded by a thoory advanced by Walker^ • in which he statesthat amphoteric electrol^tes have tv^o dissociation constants, cor-responding to dissociation into acid and base; thorofore, that the Z. physik. , 49, 82 (1
The conductivity and dissociation of organic acids in aqueous solution at different temperatures .. . = 128). Fig. Ill—I. Benzoic acid; II. Succinic acid; III, Phenylacetic acid; IV. GaUic add Lution, they would fctll apart on increas temperature, and the fi^e acid v7ould conduct than the salt it-self. Another explanation for tho bohavior of these ariino acidsis afforded by a thoory advanced by Walker^ • in which he statesthat amphoteric electrol^tes have tv^o dissociation constants, cor-responding to dissociation into acid and base; thorofore, that the Z. physik. , 49, 82 (1904) (60) CeU-ald constants the disaociciticn cf the amino aciia reasuredir. tho usual manner aro orroneous. He calculated the value for theconductivity of the acids upon his asc^jiriptions, and obtained resultsa^^rooing with those exporir;ontally obtained by Ostwald and Winkol-blech^--^. ?/hile inorganic salts and mineral acids all behave in tho sar:ov/ay v/ith respect tc the chan-e ir. dissociation v/ith tho torperature,the organic acids present a perplexinj problem, whan an attempt is. Molecular ConducHmly (F = 128).Fig. IV.—I. /?-Aminobeiizoic acid; II. a-Aminoben^oic i nade to deduce any relation between the change of their dissociationand their chsrdcal constitution. 7?ith irany of the acids, a naxininriin dissociation occurs between 25° and 35°. This 3tat3r:0nt appliesto the folio-vine aoids,—acetic, propionic, phenylac^tic, hippuric,malonic, iTxiloic, furraric, crotonio, benzoic, p-tolnic, cinnardo,salicylic, r-oxybenzoic Tho dissociation of succinic, itaconic, 1. Z. physik. Cherr,., 36, 546 (1901). (61)racemic, p-^rotartaric, citric, £-toluic, £-oxybonzoic, sallic, ir^ot-anilic, sulphanilic, £- and ^ acids, increaaos fror. C°up to 35° without a , but several give indications that onewould appear at a slightly hi-hor tenpomture. The dissociation ofthe acid3,~n- and iso-cvtyric, , citraconic, mesa-conic, o
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