Question

The half-cell reactions that occur in a typical flashlight battery are: Zn(s) -t Zn2 +(aq) +2...

The half-cell reactions that occur in a typical flashlight battery are:

Zn(s) -t Zn2 +(aq) +2 e- 2

Mn02(s) + Zn2 +(aq) + 2 e- -t ZnMn204(s)

Write a chemical equation describing the net cell reaction.

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Answer #1

oxidation half reaction : Zn(s) ----> Zn^2+(aq) + 2 e-

reduction half reaction : 2Mn02(s) + Zn2 +(aq) + 2 e- ------> ZnMn204(s)

Zn(s) ----> Zn^2+(aq) + 2 e-

2Mn02(s) + Zn2 +(aq) + 2 e- ------> ZnMn204(s)

-----------------------------------------------------------------

2Mn02(s) + Zn(s)   ------> ZnMn204(s)

---------------------------------------------------------------

overall reaction : 2Mn02(s) + Zn(s)   ------> ZnMn204(s)

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