For the cell Zn(s)\left | Zn^{2+}(aq) \right |\left | M^{x+}(aq) \right |M(s), different half cells and their standerd electrode potential are given below :

If E^{0}_{zn^{2+}/zn} = -0.76V ,which cathode will give a maximun value of E^{0}_{cell}  per electron transfered?

  • Option 1)

    Au^{3+}/Au

  • Option 2)

    Fe^{3+}/Fe^{2+}

  • Option 3)

    Fe^{2+}/Fe

  • Option 4)

    Ag^{+}/Ag

Answers (1)
A admin

 

Standard Electrode Potential Value -

As we know that

E^{0} cell= E^{0}_{oxidation }+E^{0 }_{reduction}

=E^{0 }_{Zn\left ( s \right )Zn}^{2+}+E^{0}_{Al^{+3}/Au\left ( s \right )}

= 0.76+1.40 V

= 2.16

E0cell is maximum with E0Au+3/Au(s) among others In thecell reaction elecrons transfered quantity doesn't matter.

-

 

 


Option 1)

Au^{3+}/Au

Option 2)

Fe^{3+}/Fe^{2+}

Option 3)

Fe^{2+}/Fe

Option 4)

Ag^{+}/Ag

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