Question

$Ni|N{i}^{2+}||C{u}^{2+}|Cu$

The standard EMF of the above cell is 0.59 V. The standard electrode potential (reduction potential) of the copper electrode is 0.34 V. Calculate the standard electrode potential of nickel electrode.

• A. $-0.5V$
• B. $0.25V$
• C. $0.93V$
• D. $-0.25V$

Answer 1

The correct option is D $-0.25V$

$E_{cell}^{\ominus }=(E_{red}^{\ominus }{)}_c-(E_{red}^{\ominus }{)}_a$

$0.59V=0.34-(E_{red}^{\ominus }{)}_a$

$\therefore E_{N{i}^{2+}|Ni}^{\ominus }=-0.25V$

Thus, the standard electrode potential of the nickel electrode is -0.25 V.

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