Measurement of the activity coefficient of aqueous NaHS to 80°C and 0.2m in the system NaHS?H2S?H2O |
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| Authors: | F L Herr Jr G R Helz |
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| Institution: | (1) Department of Physiology of Man and Animals, Kazan State University, Kremlevskaya 18, Kazan, 420008, Russia;(2) Department of Cell Biology, Division of Animal Physiology, University of Salzburg, Hellbrunnerstr. 34, 5020 Salzburg, Austria; |
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| Abstract: | Values for the mean stoichiometric activity coefficient of NaHS in the system NaHS?H2S?H2O are presented from 12 to 83°C for NaHS concentrations up to 0.2m and for H2S fugacities up to 1 atm. The measurements were made potentiometrically using a novel approach employing three commercially available specific ion electrodes (Na+ glass, H+ glass, and Ag2S) combined to form two cells without liquid junction. The results are described by the equation
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