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The values of the standard oxidation pot...

The values of the standard oxidation potentials for some reactions are given below :
`{:(Zn to Zn^(2+) +2 e^(-)"," ,, E^(@) = + 0.762 V) , (Fe to Fe^(2+) + 2e^(-)"," ,, E^(@) = + 0.440V),(Cu + Cu^(2+) + 2e^(-) "," ,, E^(@) = -0.345 V) , (Ag to Ag^(+) + e^(-) "," ,, E^(@) = -0.800 V):}`
Which one of the following is most easily reduction undergo ?

A

`Zn^(2+)`

B

`Fe^(2+)`

C

`Cu^(2+)`

D

`Ag^(+)`

Text Solution

Verified by Experts

The correct Answer is:
D
O.P. of Ag is lowest so more easily undergo reduction .
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The standard oxidation potential, E^(@) , for the reactions are given as: Zn rightarrow Zn^(2+) + 2e^(-) , E^(@) = +0.76V Fe rightarrow Fe^(2+) + 2e^(-) , E^(@) = +0.41V The emf for the cell : Fe^(2+) + Zn rightarrow Zn^(2+) + Fe

The standard oxidation potentials, , for the half reactions are as follows : Zn rightarrow Zn^(2+) + 2e^(-) , E^(@) = +0.76V Fe rightarrow Fe^(2+)+ 2e^(-), E^(@) = + 0.41 V The EMF for the cell reaction, Fe^(2+) + Zn rightarrow Zn^(2+) + Fe

The standard oxidation potentials, E^(@) , for the half reactions are as, Zn rarr Zn^(2+) + 2e^(-), " " E^(@) = + 0.76 volt Fe rarr Fe^(2+) + 2e^(-), " " E^(@) = +0.41 volt The emf of the cell, Fe^(2+) + Zn rarr Zn^(2+) + Fe is:

The standard reduction potential E^(@) , for the half reaction are : {:(Zn rarr Zn^(2+) + 2e^(-),,,E^(@) = 0.76 V),(Cu rarr Cu^(2+) + 2e^(-),,,E^(@) = 0.34 V):} The emf for the cell reaction, Zn(s)+Cu^(2+) rarr Zn^(2+) + Cu(s) is :

The half reactions for a cell are Zn to Zn^(2+) + 2e^(-), E^(@) = 0.76 V Fe to Fe^(2+) + 2e^(-), E^(@) = 0.41 V The DeltaG^(@) (in kJ) for the overall reaction Fe^(2+) + Zn to Zn^(2+) + Fe is

The standared reduction potntial E^o for the half-reactions are as. Zn=Zn^(2+) + 2 e^- , E^o = + 76 V Fe = Fe^(2+) + 2e^- , E^o = + 0.41 V . The EMF for cell recaction Fe^(2+) = Zn rarr Zn^(2+) + Fe is.

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