Abstract
The electrical conductivities of hydrochloric acid and potassium chloride in water have been measured in the concentration range of 3×10−4–10−3 moles-dm−3 at 0°C up to 3500 bar. The limiting molar conductance (Λ0) for HCl increases with increasing pressure, while Λ0(KCl) has a maximum around 1700 bar. The excess conductance of hydrogen ion [λ E0 =Λ0(HCl)−Λ0(KCl)] increases with increasing pressure. Its pressure dependence indicates that the reorientation of water molecules, which is the rate-determining step in the proton jump, becomes faster at higher pressure. This anomaly is attributed to the distortion with pressure of the hydrogen bonds in water.
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Ueno, M., Nakahara, M. & Osugi, J. Effect of pressure on the conductivities of HCl and KCl in water at 0°C. J Solution Chem 8, 881–886 (1979). https://doi.org/10.1007/BF00644884
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DOI: https://doi.org/10.1007/BF00644884