(b) Figure 4 shows the Pourbaix diagrams of Metal A and B, respectively. The dotted sloping lines are water equilibrium lines. Metal A Pourbaix Diagram Metal B Pourbaix Diagram 2.0 1.6 1.2 0.8 BO (s) 0.4 A,0, (0) AO, 0.4 -0.8 B () 1.2 A (s) 1.6 -2 10 12 14 16 PH pH Figure 4 Answer the following questions based on Figure 4. i. Choose a potential and pH value where Metal A is passive while Metal B undergo anodic dissolution into its cation. ii. Choose the pH values where Metal A is independent of potential and dependent on pH. iii. At 0.8V, evaluate how a change in pH from 4 to 8 would affect the stability of Metal A and Metal B. Potential, VSHE Potential, VsHE
(b) Figure 4 shows the Pourbaix diagrams of Metal A and B, respectively. The dotted sloping lines are water equilibrium lines. Metal A Pourbaix Diagram Metal B Pourbaix Diagram 2.0 1.6 1.2 0.8 BO (s) 0.4 A,0, (0) AO, 0.4 -0.8 B () 1.2 A (s) 1.6 -2 10 12 14 16 PH pH Figure 4 Answer the following questions based on Figure 4. i. Choose a potential and pH value where Metal A is passive while Metal B undergo anodic dissolution into its cation. ii. Choose the pH values where Metal A is independent of potential and dependent on pH. iii. At 0.8V, evaluate how a change in pH from 4 to 8 would affect the stability of Metal A and Metal B. Potential, VSHE Potential, VsHE
Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:(b) Figure 4 shows the Pourbaix diagrams of Metal A and B, respectively. The dotted
sloping lines are water equilibrium lines.
Metal A Pourbaix Diagram
Metal B Pourbaix Diagram
2.0
1.6
1.2
0.8
B2
BO (s)
во
0.4
A,0, ()
AO;
-0.4
-0.8
B (s)
-1.2
A (s)
-1.6
-2
10
12
14
16
7
14
PH
pH
Figure 4
Answer the following questions based on Figure 4.
i. Choose a potential and pH value where Metal A is passive while Metal B undergo
anodic dissolution into its cation.
ii. Choose the pH values where Metal A is independent of potential and dependent on
pH.
ii. At 0.8V, evaluate how a change in pH from 4 to 8 would affect the stability of Metal
A and Metal B.
Potential, VSHE
Potential, VSHE
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