3. Given the following Pourbaix Diagram for the NiH2O system at 25C, a. Show which regions represent corrosion, passivation and immunity. [ 10 points] b. Write the electrochemical reaction that represents the transformation from Pb2+ to PbO2. [5 points] c. If in an acidic environment of pH equal to 2 and the Pb electrode presents a potential of 1.3 V vs. SHE, what are the possible cathodic and anodic reactions taking place? [10 points] 3. Given the following Pourbaix Diagram for the NiH2O system at 25C, a. Show which regions represent corrosion, passivation and immunity. [ 10 points] b. Write the electrochemical reaction that represents the transformation from Pb2+ to PbO2. [5 points] c. If in an acidic environment of pH equal to 2 and the Pb electrode presents a potential of 1.3 V vs. SHE, what are the possible cathodic and anodic reactions taking place? [10 points]