Question

If the standard electrode potential of an electrode is greater than zero then we can infer that it's

Answer 1

If the standard electrode potential of an electrode is greater than zero then we can infer that it's reduction is favourable.

Standard Electrode Potential

• There are two type of potentials possible I.e. oxidation potential and reduction potential.

• Oxidation potential :- The potential required for oxidation . For example :- $A\: \longrightarrow\: A^{n+}\:+\:ne^-$

• Reduction potential :- The potential required for reduction of an ion. For example :- $A^{n+}\:+ne^-\:\longrightarrow\:A\:$

• IUPAC considers reduction potential as standard electrode potential of a substance.

Additional Information for IIT-JEE

• ∆G = -nF∆E

• Therefore, ∆G and ∆E will have opposite sign.

• The reaction is feasible when ∆G < 0 ,it implies it will be feasible when ∆E > 0.

• ∆G° and ∆E° are measurements taken at standard conditions.And hence, ∆G° = -nF∆E°