Partial molal volumes of alkali chlorides in aqueous solution to 200°

Abstract

The densities of lithium, sodium, potassium, and cæsium chloride solutions up to 200° were determined by a mercury displacement method. Values of the apparent molal volume of the salts and of the limiting partial molal volume, ϕ°, are reported. ϕ° for the alkali chlorides passes through a maximum at about 60°(LiCl at 40°) and by 200° falls to a value ranging from –7·6 for LiCl to 23·6 for CsCl (16–24 units lower than at 25°). The values of ϕ° are related to the density of water, and are correlated by the equations for intrinsic volume of the ions and for the electrostriction effect as suggested by Glueckauf.