ELECTRICAL CONDUCTANCES OF SOME ALKALI METAL HALIDES IN AQUEOUS SOLUTIONS FROM 0 TO 800 DEGREES AND AT PRESSURES TO 4000 BARS

The electrical conductances of 0.01 m aqueous solutions of LiCl, NaI, KCl, KBr, KI, RbF, RbCl, RbBr, RbI, CsCl, CsBr, and CsI were measured from 0 to 800° and at pressures to 4000 bars. Evaluation of these results, together with those from previous measurements on NaCl and NaBr, indicate that in general all of these electrolytes exhibit the same type of conductance behavior at elevated temperatures and pressures. Thus at high temperatures where most of the long-range structure of water appears to be destroyed, the relative order of the specific conductances of these electrolytes remains constant - except for some instances at the highest temperatures when association effects appear to change this order. At temperatures below 100°, comparative changes in the specific conductances of these electrolytes both with temperature and pressure can be correlated with the apparent disruption of the structure of water by the ions, by pressure, and by temperature. Thus, the present measurements indicate that the simpler behavior observed quantitatively in previous extensive measurements on several electrolytes at high temperatures and pressures probably can be extended to include all of the alkali metal halides.