Hi all,
I am trying to calculate the saturation index of galena in solution. In my project I mix 2mM Lead nitrate with 7.8 Na2S and adjust the pH to 5.5, I entered these numbers in geochemist's workbench and attached it to this message. But I do not know the pe number. Would you please check the file I attached to see if the what I have entered correct or not? So why galena is under saturation?
For example is it OK I swap s with SO4-2?
What about the pe?
Pb-S.sp8