Question

The standard reduction potentials of Cu${}^{2+}$/Cu and Cu${}^{2+}$/Cu${}^{+}$ are 0.337 and 0.153V respectively. The standard electrode potential of Cu${}^{+}$/Cu half cell will be :

• A. 0.184V
• B. 0.827V
• C. 0.521 V
• D. 0.490 V

Answer 1

The correct option is A 0.184V

$C{u}^{2+}+2e^{-}\to Cu$ ; SRP=0.337 ---(1)

$C{u}^{2+}+e^{-}\to C{u}^{+}$ ; SRP=0.153 ---(2)

$C{u}^{+}+e^{-}\to C{u}^{+}$

$\therefore E_{cell}=SR{P}_{\left(1\right)}-SR{P}_{\left(2\right)}$

$=0.337-0.153$

$=0.184$

Hence, the correct option is $\text{A}$