Electrical conductance of aqueous solutions of KCl solutions at pressures up to 2000 atm

Electrical conductance measurements are reported for aqueous KCl solutions at 25°C as a function of concentration up to 0.02 M and pressure up to 2000 atm. The data from 103 runs were analyzed with the Fuoss-Hsia-Fernandez-Prini (FHFP) equation. The standard error of fit varies from 0.018 at 1 atm to 0.12 at 2000 atm. The increase of with pressure arises from increasing nonrandomness in the distribution of errors about the FHFP equation, suggesting that modifications in the theory are necessary. Departures from the Walden product for KCl as a function of pressure are compared with MgSO₄ and CaSO₄ in aqueous solutions.