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Hearing Aid Batteries Utilize a Zinc/air Electrochemical Cell \rightarrow Zn(s) + 2OH-(aq)
-1)249 V
O2(g) + 2H2O( )

Question 43

Multiple Choice

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- \rightarrow Zn(s) + 2OH-(aq)
-1) 249 V
O2(g) + 2H2O(  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) <sub>2</sub>(s)  + 2e<sup>-</sup>  \rightarrow  Zn(s)  + 2OH<sup>-</sup>(aq)  -1) 249 V O<sub>2</sub>(g)  + 2H<sub>2</sub>O(   )  + 4e<sup>-</sup> \rightarrow  4OH<sup>-</sup>(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. ) + 4e- \rightarrow 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.

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