Q. If the standard electrode potential of ${Cu}^{2 +}$ / Cu electrode is 0.34 V, what is the electrode potential at 0.01 M concentration of ${Cu}^{2 +}$? ($T\ = \ 298\ K$)

A) 0.399 V
B) 0.281 V
C) 0.222 V
D) 0.176 V
Explanation

(b)
$E_{cell} = \ E_{cell}^{{^\circ}} + \ \frac{0.059}{n}\log{\lbrack M^{n +}\rbrack}$
$E_{cell} = \ 0.34\ + \ \ \frac{0.059}{2}\log 10^{- 2}$
$= \ 0.34\ + \ \frac{0.059}{2}\ \times \ - 2$
= + 0.281 V

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.