Overview
Construct the pe-pH diagram for the Cr-O-H2O system at 25 degrees C and 1 atm; if the activity of chromium (Cr) is 10^-6 M. The chromium species shown below are the only prevalent species formed in this aqueous system:

1. Using the attached thermodynamic data and species equations, please show a step-by-step approach of finding the answers to the boundary equations.
I believe species equations 1, 2, 3, 5, and 6 should be vertical lines, and equations 4, 7, 8, 9, and 10 should be diagonal.
2. Please then plot the pe-pH diagram.