Showing papers by "Wilder D. Bancroft published in 1899"

The dilution law

Abstract: In 1888 Ostwald ') pointed out that the mass law formula should describe the change of dissociation of a binary electrolyte with the concentration. The measurements of Ostwald were promptly supplemented by those of van't Hoff and Reicher*). Further investigation showed that Ostwald's dilution law, as it is called, describes the facts only for weak acids and bases and appears not to hold for salts (in the narrower sense of the word), for strong acids and strong bases. In 1895 Kudolphi3) proposed an empirical change in the fora* a* mula. writing K— — instead of K= , , where a ( l a ) V F is the percentage dissociation and V the volume in which one molecular weight of the binary electrolyte is dissolved. This formula was a3 almost immediately modified by van't Hoff4), who wrote it K ^ty