2.) The standard EMF of the cell reaction Zn+Cu2+ → Cu+Zna is 1.10V at 25°C. The EMF for the
cell reaction when 0.1M Cu2+ and 0.1M Zn2solutions are used at 25°C, is
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Answer:
E=E
0
−
n
0.059
logKwhereE
0
=1.10V
Zn+Cu
2+
(0.1M)→Zn
2+
(0.1M)+Cu
Thus, n=2. So, for this reaction
E=E
0
−
2
0.059
log
0.1
0.1
=E
0
=1.10V
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