Question

The standard electrode potential of some electrodes are given below.

• Ag⁺/Ag = + 0.80 V
• Fe²⁺/Fe = – 0.44 V
• Cu²⁺/Cu = + 0.34 V
• Al³⁺/Al = – 1.66 V

Construct 4 possible electrochemical cells and calculate the cell potential of the corresponding cells?

Answer 1

Fe²⁺|Fe||Ag⁺|Ag \(E^\ominus_{cell}\) = (+0.80) - (-0.44) = +1.24 V

Fe²⁺|Fe||Cu²⁺|Cu \(E^\ominus_{cell}\) = (+0.34) - (-0.44) = +0.78 V

Al³+|Al||Cu²⁺|Cu \(E^\ominus_{cell}\) = (+0.34) - (-1.66) = +2.00 V 

Al³⁺|Al||Ag⁺|Ag \(E^\ominus_{cell}\) = (+0.80) - (-1.66) = +2.46 V