Ion-ion and ion-water interactions at high pressure

Abstract

Several subjects concerning aqueous electrolyte solutions at high pressure are reviewed and discussed mainly on the basis of the recent conductometric investigation. The selection of the topics is not comprehensive at all but only characteristic of the particular interests of the present authors. In the Introduction, there are a summary of the conductivity measurement carried out at high pressure so far since 1970 and a discussion of the objects and problems in the conductometric research. in Section 2, the validity of the Debye-Huckel-Onsager theory at high pressure is presented and the empirical equation of Hamann and Linton for ionic activity coefficient at high pressure is criticized. In Section 3, the ion-pair equilibria at high pressure are briefly referred to. In Section 4 are discussed such subjects as the way to obtain Λ° from Λ, the comparison of the reported values of Λ° (KCl). Λ° (RCO_2 K) and Λ° (HCl), transference numbers. hydration numbers, Walden products and the water structure.