What is aqueous geochemical modelling?
https://www.ndsu.edu/webphreeq/geomodel.html
Approximations of this kind of calculation can be done on a hand calculator or on a spreadsheet. More detailed calculations can be done using computer programs such as PHREEQC, WATEQ4F, MINTEQ, EQ3/6, ChemEQL, GEMS, and the Geochemist's Workbench. WEB-PHREEQ HOMEPAGE
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