Question

When a cathode half cell electrode $A{g}^{+}/Ag$ is connected with a reference electrode (Standard hydrogen electrode), the mearsured standard EMF of the cell is $0.80V$. What will be the standard electrode potential of $A{g}^{+}/Ag$?

• A. $-1.2V$
• B. $-0.8V$
• C. $1.2V$
• D. $0.8V$

Answer 1

The correct option is D $0.8V$

$E_{cell}^{\circ }=E_{A{g}^{+}/Ag}^{\circ }-E_{SHE}^{\circ }$

The reference electrode is arbitrarily assumed to be zero.
$\therefore$
$E_{SHE}^{\circ }=0$
Given,
$E_{cell}^{\circ }=0.80V$

Thus,
$0.80=E_{A{g}^{+}/Ag}^{\circ }-0$

$E_{A{g}^{+}/Ag}^{\circ }=0.80V$

The standard electrode potential of $A{g}^{+}/Ag$ electrode is $0.80V$