In order to draw Pourbaix Diagram for a metal, all possible electrochemical and chemical reactions have to be known and with the application of Nernst equation or solubility product constant, the E-pH diagram can be constructed. We have looked at the diagram for Fe. While the Pourbaix diagram of Fe is quite complex due to its two oxidation states +2 and +3, construct a simplified Pourbaix diagram for Fe considering only the following three reactions. Note: CFe+2 and CFe+3 can be taken as 10-6 M

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