Joint Expert Speciation System

One of the best resources for looking at the way equilibrium constants K vary with ionic strength is the Web-based resource Joint Expert Speciation System (JESS) available at http //jess.murdoch.edu.au/jess/jess home.htm. Notice the way that values of any equilibrium constant (Ka, Kw, etc.) changes markedly with ionic strength I. 

P. M. May and K. Murray, Joint Expert Speciation System, 2000, http //jess.murdoch.edu.au/jess/jess home.htm. 

TABLE 10.6. Aqueous Al-Citrate and Fe(III)-Citrate Species for Which Formation Constants Are Tabulated in the Joint Expert Speciation System (JESS) (May and Murray, 2000) and the National Institute of Standards and Technology (NIST) (Martell et al., 2004) Thermodynamic Database Compilations... 

Compilations of data can be found, e.g., in the classical papers by Pitzer and co-workers [1,6,7]. A very useful tool is provided by the Joint Expert Speciation System (JESS), a joint project of two groups in Australia and South Africa [8, 9]. Also interesting is the data bank from CERE of the Technical University of Denmark for electrolyte solutions [10] and the ELDAR data bank integrated in the Dechema s DETHERM data bank [11] containing values from which activity coefficients can be calculated. 

May PM, Rowland D, Konigsberger E, Hefter G (2010) JESS, a joint expert speciation system - IV a large database of aqueous solution physicochemical properties with an automatic means of achieving thermodynamic consistency. Talanta 81(1-2) 142-148... 

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