webmaster Posted November 8, 2004 Share Posted November 8, 2004 From: Enrique Portugal Marin Subject: ph-Calculation I am just starting to use gwb to applied to geochemical modeling to be used in geohtermometry of hot spring developed in igneous rocks. I followed the example in Bethke's book, but instead swap CO2 for HCO3- I used HCO3- data. I noticed that gwb pH calculation is based on CO2 to give bicarbonate and H+. Can gwb make a pH calculation more rigorously that involve pH-dependent ions like SiO2 (H2SiO4), NH4+ etc ? From: Craig Bethke Subject: Re: ph-Calculation Yes, you can use any pair of species that form a protonation reaction to constrain pH. Just add or swap each into the basis, and then for each constrain concentration, activity, or fugacity. Quote Link to comment Share on other sites More sharing options...
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