Hearing Aid Batteries Utilize a Zinc/air Electrochemical Cell Zn(s) + 2OH-(aq)
-1)249 V
O2(g) + 2H2O(l) + 4e-
Hearing aid batteries utilize a zinc/air electrochemical cell. The reduction half-reactions and standard reduction potentials for this cell are given below. What species are oxidized and reduced in the cell reaction?
Zn(OH) 2(s) + 2e- Zn(s) + 2OH-(aq)
-1) 249 V
O2(g) + 2H2O(l) + 4e- 4OH-(aq)
+0.401 V
A) Oxygen is reduced and zinc is oxidized.
B) Zinc is reduced and oxygen is oxidized.
C) Zinc hydroxide is reduced and oxygen is oxidized.
D) Zinc hydroxide is reduced and hydroxide is oxidized.
E) Water is reduced and zinc is oxidized.
Correct Answer:
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