Calculate emf of the cell
Zn(s) Zn2®(0.2M)||H®(1.6M)|
H,(g, 1.8 atm) Pt at 25°C.
(0.785V)
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Answer:
Standard reduction potential of Ag
+
/Ag=0.80V.
Standard reduction potential of Cu
2+
/Cu is less than Ag
+
/Ag.
∴Ag
+
/Ag will get reduced at cathode.
Cu
2+
/Cu will get oxidized at anode.
∴E
cell
∘
=E
cathode
∘
−E
anode
∘
E
cell
∘
=0.80−0.34=0.46V.
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