Zusammenfassung
The ion interaction approach developed by Fitter allows the prediction
of thermodynamic characteristics of mixed electrolyte solutions at
various temperatures, if the respective parameters for each type
of single electrolyte solution are known. Among such thermodynamic
characteristics are the volumetric ones (density and apparent molal
volumes). A database for the densities and the apparent molal volumes
versus concentrations was developed at a temperature interval of
288.15-368.15 K using all available literature sources for each single
electrolyte solution formed by various electrically neutral combinations
of the following ions (Na+, K+, Mg2+, Ca2+, Sr2+, Ba2+, Cl-, Br-,
HCO3-, CO32-, and SO42-). these are the most important ions for industrial
solutions as well as for natural waters. Statistical treatment was
applied to this database in order to discard Door data. The proper
treatment of all sound quality apparent molal volumes, in a wide
range of concentrations from infinite dilution through saturation,
allowed us to compute sets of volumetric ion interaction parameters
((V) over bar (0)(MX), beta ((0)V)(MX), beta ((1)V)(MX), beta ((2)V)(MX),
and C-MX(V)) at various temperatures in a 288.15-368.15 K temperature
interval, The validity of the selected sets at various temperatures
was demonstrated by a comparison of the experimental and calculated
densities for multiple-solute electrolyte solutions containing NaCl,
KCl, MgCl2, and CaCl2 with an ionic strength reaching 9.23 that resembled
Dead Sea water. (C) 2001 American institute of Physics.
Nutzer