Models to Calculate Activity Coefficients
In DATABASE the equilibrium constants are given
for zero ionic strength
(I = 0), and it is possible to
enter a value for the ionic strength
when making a diagram in SPANA to calculate
the activity coefficients
(also using the temperature).
If the advanced program level is selected in the menu
“Preferences / General options”
in SPANA,
then the user may select a model to evaluate
activity coefficients. The following models may be selected:
All these models are based on the Debye-Hückel model.
Comparison between models
A comparison of some experimental data with the models listed above
may be found here.
Examples on the ionic strength effect on diagrams
May be found here.
