Question: 41. The half reaction at a barium electrode is: Ba2+ + 2e- Ba For a cell using a barium electrode and a hydrogen electrode, E

41. The half reaction at a barium electrode is: Ba2+ + 2e- Ba For a cell using a barium electrode and a hydrogen electrode, E = +2.90 V. What is the standard reduction potential of the barium electrode? Answers A. 2.90 V B. 1.45 V C. 1.45 V D. 2.90 V Question42. In a dry cell, the electrolyte is a _________. Answers A. solid B. paste C. liquid D. gas Question43. A cell is built using two electrodes: What reaction occurs at the cathode? Al3+ + 3e Al E = -1.66V Cu2+ + 2e Cu E = +0.34V Answers A. Cu Cu2+ + 2e- B. Cu2+ + 2e- Cu C. Al3+ + 3e- Al D. Al Al3+ + 3e- Question44. How is a lead storage battery recharged? Answers A. A direct current is applied to it. B. A magnet is held close to it. C. Alternating current is forced through it. D. The pressure on it is increased. Question45. When a lead storage battery discharges, the concentration of Answers A. sulfuric acid increases. B. sulfuric acid decreases. C. lead sulfate in the battery decreases. D. lead sulfate in the battery remains constant. Question46

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