forms Ni 47. Consider the following diagram of a piece of iron, cathodically protected by magnesium: Water containing dissolved oxygen Iron Magnesium What is happening during this process? * A. Iron acts as the anode and water is oxidized. B. Iron acts as the cathode and oxygen is reduced. X C. Magnesium acts as the anode and iron is oxidized. D. Magnesium acts as the cathode and iron is reduced. C - Ni

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47
What is the Eº for Nb³ + 3e Nb?
A. -1.90V
B.71.10V
C.-0.50V
D.-0.40V
46. Consider the overall reaction for the rechargeable nickel-cadmium battery:
Cd+NiO₂ + 2H₂O → Cd(OH)2 + Ni(OH)₂
Which of the following occurs at the cathode as the reaction proceeds?
Cd Cd²+2e=
A. Cd loses 2e and Cd(OH)₂ forms
B. Cd gains 2e and Cd(OH)₂ forms
C. NiO₂ loses 2e and Ni(OH)₂ forms
D/NiO₂ gains 2e and Ni(OH)₂ forms
✓
fff
Ni +2e- -
47. Consider the following diagram of a piece of iron, cathodically protected by
magnesium:
Water containing dissolved oxygen
Iron
Magnesium
What is happening during this process?
A. Iron acts as the anode and water is oxidized.
B. Iron acts as the cathode and oxygen is reduced. X
C. Magnesium acts as the anode and iron is oxidized.
D. Magnesium acts as the cathode and iron is reduced.
48. Consider the following operating cell:
2
N; ¹4
Transcribed Image Text:What is the Eº for Nb³ + 3e Nb? A. -1.90V B.71.10V C.-0.50V D.-0.40V 46. Consider the overall reaction for the rechargeable nickel-cadmium battery: Cd+NiO₂ + 2H₂O → Cd(OH)2 + Ni(OH)₂ Which of the following occurs at the cathode as the reaction proceeds? Cd Cd²+2e= A. Cd loses 2e and Cd(OH)₂ forms B. Cd gains 2e and Cd(OH)₂ forms C. NiO₂ loses 2e and Ni(OH)₂ forms D/NiO₂ gains 2e and Ni(OH)₂ forms ✓ fff Ni +2e- - 47. Consider the following diagram of a piece of iron, cathodically protected by magnesium: Water containing dissolved oxygen Iron Magnesium What is happening during this process? A. Iron acts as the anode and water is oxidized. B. Iron acts as the cathode and oxygen is reduced. X C. Magnesium acts as the anode and iron is oxidized. D. Magnesium acts as the cathode and iron is reduced. 48. Consider the following operating cell: 2 N; ¹4
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