We have measured the conductance of LiCl·RH2O, R = 4.5, 7.0, and 8.75, solutions from -70 to 10°C and AlCl3·RH2O, R = 2.4, 3, and 18, solutions from -10 to 10°C from 1 bar to 4 kbar. Glass transition temperatures for LiCl·RH2O where R = 3.0, 4.5, 8.5, and 10.0, LiI·RH2O where R = 6.0, 8.5, and AlCl3·RH2O where R = 18.0, 24.0, and 30.0 to 4 kbar were also measured. The maximum in conductance for LiCl cannot be explained by minimum Tg, since all of these increase linearly with increasing pressure. Therefore, we attribute the conductance maxima in concentrated LiCl solutions to pressure-enhanced proton mobility, where the protons arise from the hydrolysis of the metal cation. Conductance maxima in dilute solutions are ascribed to the pressure-enhanced structure-breaking effects of the ions.
|Number of pages||6|
|Journal||The Journal of Physical Chemistry|
|Publication status||Published - 1 Dec 1986|