Act2 generates stability diagrams on activity, Eh, pe, pH, and fugacity axes.

Select main species to diagram.

Diagram axes

Move to the Plot pane. You can copy the diagram and paste it into your documents.

Eh-pH diagram

Activity diagram

Fugacity diagram

Select Al+++ as the main species to diagram and as the y-axis variable.

Choose pH for the x-axis.

Set temperature.

A Solubility diagram uses the activity of the main species as an axis variable.

Solubility diagram

Mosaic diagrams account for the speciation ofcomplexing ligands with pH and redox state.

Click on SO42− unit pulldown

and select speciate over x-y

Mosaic diagram for arsenic-sulfur system. Dashed lines show mosaic boundaries for sulfur speciation.

Mosaic diagram

H2S(g)/CH4(g) fugacity ratio is selected. Choose an appropriate range of values.

Tact makes temperature-activity and temperature-fugacity diagrams.

Equilibrium point of the methane souring reaction,calculated as a function of temperature.

CH4(g) + Anhydrite ↔ Calcite + H2O + H2S(g)

Temperature-fugacity ratio diagram