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
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
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Science behind corrosion-test
Corrosion is defined as an activity that transforms refined metals into more chemically stable forms such as oxide, hydroxide, carbonate, or sulfide. It refers to the slow decomposition of things (typically metals); thanks to chemical and/or electrochemical reactions with their surroundings. Corrosion engineering is the science of preventing and controlling corrosion.
Corrosion
Corrosion is defined as an activity that transforms refined metals into more chemically stable forms such as oxide, hydroxide, carbonate, or sulfide. It refers to the slow decomposition of things (typically metals); thanks to chemical and/or electrochemical reactions with their surroundings. Corrosion engineering is the science of preventing and controlling corrosion.
Question
47
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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