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Title: Derivation of el'Yanov and Hamann's empirical formula and another new formula for pressure dependence of ionization constants
Authors: Nakahara, Masaru
Issue Date: 30-Apr-1975
Publisher: The Physico-Chemical Society of Japan
Journal title: The Review of Physical Chemistry of Japan
Volume: 44
Issue: 2
Start page: 57
End page: 64
Abstract: El'yanov and Hamann's empirical formula for the pressure dependence of the ionization constant, RTln(K_p/K_0)=-ΔV^^-_o^0P/(1+bP) has been derived theoretically from the Born model for ionic salvation by taking account of the pressure dependence of the dielectric constant of water. Although b does not depend on temperature and is equal to 9.20×10^-5bar^-1 according to El'yanov and Hamann, the present derivation shows that b depends on temperature, being 8.98, 9.46 and 11.67×10^-5bar^-1 at 15.25 and 45℃, respectively. Another new formula for the pressure dependence of the ionization constant has been also obtained, which becomes equal to Owen-Brinkley's formula under some condition. All the formulas proposed by several authors until now have been compared, and their similarities and differences are discussed.
Appears in Collections:Vol.44 No.2

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