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Ionization Constant of H2O as function of pressure and temperature

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The Ionization Constant of H₂O - IAPWS Formulation
See http://iapws.org/relguide/Ionization.pdf

Authors: Valery Ochkov and Aung Tu Ya Tun

Introduction

This application calculates the ionization constant of water using the formulation ratified by the IAPWS [1] in 2007 and developed by Bandura [2]. The formula is semi-empirical, and employs temperature and density as states.

This application, however, asks the user to enter temperature and pressure as states, and uses that information to calculate the density of water (via the ThermophysicalData package). This is a more practical specification of states.

References:

[1] http://iapws.org/relguide/Ionization.pdf

[2] Bandura, A. V., and S. N. Lvov, “The Ionization Constant of Water over a Wide Range of Temperatures and Densities.” J. Phys. Chem. Ref. Data, Vol. 35, 2006, pp. 15-30.

restart; with(ThermophysicalData); with(Units[Standard])