Electrical conductance of LiBr in acetone at high pressure and 25C

Abstract

The electrical conductance of LiBr in anhydrous acetone was measured at 25℃ up to 5000kg/cm^2. The limiting equivalent conductance Λ° and the ion-pair dissociation consiant K-d were determined by the Shedlovsky method: Λ°=192Ω^-1 ・cm^2 ・ equiv.^-1, K_d=2.36×10^-4 mole/l at atmospheric pressure. The closest approach distance of the ion pair, a, calculated by the Fuoss equation increases slightly with pressure. The volume change with the dissociation, ΔV^^-°_d, is -25cm^3/mole. Both a and ΔV^^-°_d suggest that this ion pair would be considerably solvated.