Hearing Aid Batteries Utilize a Zinc/air Electrochemical Cell 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 is the reducing agent in the cell reaction? Zn(OH) 2(s) + 2e- Zn(s) + 2OH-(aq)
-1) 249 V
O2(g) + 2H2O(
) + 4e- 4OH-(aq)
+0) 401 V
A) oxygen
B) zinc
C) zinc hydroxide
D) hydroxide
E) water
Correct Answer:
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