Question

The standard electrode potential of $A{g}^{+}/Ag$ is $+0.80V$ and of $C{u}^{2+}/Cu$ is $+0.34V$. These electrodes are connected through a salt bridge and if:

• A. Copper electrode acts as cathode, then $E_{cell}^{\circ }$ is $+0.46volt$
• B. Silver electrode acts as anode, then $E_{cell}^{\circ }$ is $-0.34volt$
• C. Copper electrode acts as anode, then $E_{cell}^{\circ }$ is $+0.46volt$
• D. Silver electrode acts as cathode, then $E_{cell}^{\circ }$ is $-0.34volt$

Answer 1

Answer: (C)

Copper electrode acts as anode, then $E_{cell}^{\circ }$ is $+0.46volt$

Standard reduction potential of $A{g}^{+}/Ag=0.80V$.

Standard reduction potential of $C{u}^{2+}/Cu$ is less than $A{g}^{+}/Ag$.

$\therefore A{g}^{+}/Ag$ will get reduced at cathode.

$C{u}^{2+}/Cu$ will get oxidized at anode.

$\therefore E_{cell}^{\circ }=E_{cathode}^{\circ }-E_{anode}^{\circ }$

$E_{cell}^{\circ }=0.80-0.34=0.46V$.