Standard electrode potential (reduction potential) becomes equal to cell potential, when

Question

Standard electrode potential (reduction potential) becomes equal to cell potential, when (A) either anode or cathode is the hydrogen electrode (B) anode is the hydrogen electrode (C) cathode is the hydrogen electrode (D) None of the above

Tardigrade Admin · Accepted Answer

When anode is the hydrogen electrode, E H 2° =0 E° =ER°-EL°=ER°-0=ER°

Q. Standard electrode potential (reduction potential) becomes equal to cell potential, when

either anode or cathode is the hydrogen electrode

anode is the hydrogen electrode

cathode is the hydrogen electrode

None of the above

When anode is the hydrogen electrode,
$E_{H_{2}}^{\circ} = 0$
$E^{\circ} = E_{R}^{\circ} - E_{L}^{\circ} = E_{R}^{\circ} - 0 = E_{R}^{\circ}$

Q. Standard electrode potential (reduction potential) becomes equal to cell potential, when

either anode or cathode is the hydrogen electrode

anode is the hydrogen electrode

cathode is the hydrogen electrode

None of the above

When anode is the hydrogen electrode, EH2​∘​=0 E∘=ER∘​−EL∘​=ER∘​−0=ER∘​

When anode is the hydrogen electrode,
$E_{H_{2}}^{\circ} = 0$
$E^{\circ} = E_{R}^{\circ} - E_{L}^{\circ} = E_{R}^{\circ} - 0 = E_{R}^{\circ}$