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[OLD] Species with O2(aq)


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From: Andy Wilde

Subject: Species with O2(aq)

I am attempting to simulate the interaction between an hypothetical ore-forming brine and a shale-like host-rock at 200 degC. My question concerns the plotting of species with O2(aq). As the attached plot shows (*.cgm) a number of species are plotted that do not contain O2(aq). Can anyone explain why this is?

 

From: Craig Bethke

Subject: Re: Species with O2(aq)

The species in your plot do indeed contain O2, but in negative amounts. For example, H2S(aq) = SO4-- + 2 H+ - 2 O2(aq). There is a discussion in the green book on the choice of components and why components can be present at negative mass.

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