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What's the difference between "free kg" and "kg" of H2O (in the basis pane of REACT)? Thanks!

Thank you, Brian. The thermo_minteq.dat has all the Sb species and minerals I need, but when I try to use it in an Eh-pH diagram, I get a warning "Reaction for H2(g) is missing; can not plot water limit". Do I need to add H2(g) to the database? I would have thought it would have that already? Sorry for these beginner questions and thanks for your help!

Hello, I'm sorry; I have the feeling this is going to be a very basic question. I am trying to make an Eh-pH diagram for Sb using Act2, but I don't see a antimony in the diagram species. Please help. Thank you!

Hello, I am using spec8 to determine saturation indices with respect to a number of different minerals in a system that I am working on. I would like to add error bars on the plot I am making with the indices. Do you have any suggestions on how to estimate the uncertainty associated with the saturation indices calculations? Thanks for your help!

Thank you! Fixed it and now it works!

Thank you, Attached is my scatter file. Thanks again! Mn scatter file eh Mn M.txt

Hello, I am trying to make a plot in Act2 that has Mn activity on the y-axis and eh on the x-axis. The system is at a constant pH 7 and H2O activity is equal to 1. It appears I was able to do this successfully. Now, I would like to plot field data of eh and Mn activity for a number of samples. I have made the text file but when I tried to "get scatter data", I received the error message: Can't plot scatter data; doesn't contain: H2O Thank you for your help!!!!!