Alfisol, Item 007: IExFit, version 3.2
Fit adsorption data based on ion exchange reaction models.
Display solid & liquid & gas phase speciation diagrams as a funciton of pH and redox conditions.

(more software)

Step 3: Run Aqueous Speciation - Tab: pe-pH or Eh-pH

Click on the "pe-pH" tab to view the distribution of each of the solids formed as a function of pH.
In the example below, we see the pe-pH redox diagram for iron(II) and iron(III).