MCQ
Given $E_{C{u^{2 + }}/Cu}^o = 0.34\,V\,,\,E_{C{u^{2 + }}/Cu}^o = 0.15\,V$ Standard electrode potential for the half cell $Cu^+/Cu$ is ............. $\mathrm{V}$
- A$0.38$
- ✓$0.53$
- C$0.19$
- D$0.49$
✓
Answer
Correct option: B.
$0.53$
b
$C{u^{ + + }}\, + \,{e^ - }\, \to \,C{u^ + }$
$C{u^{ + + }}\, + \,{e^ - }\, \to \,C{u^ + }$
$E_1^o\, = \,0.15\,\,V;$ $\Delta G_1^o\, = \, - \,{n_1}E_1^oF$
$C{u^{2 + }}\, + \,2e\, \to \,Cu$
$E_2^o\, = \,0.34\,V;$ $\Delta G_2^o\, = \, - \,{n_2}E_2^oF$
On subracting eq.$(i)$ from eq. $(ii)$ we get
$C{u^ + }\, + \,{e^ - }\, \to \,Cu;$ $\Delta {G^o}\, = \,\Delta G_2^o\, - \,\Delta G_1^o\,$
$ - n{E^o}F\, = \, - \,({n_2}{E^o}F\, - \,{n_1}E_1^oF)$
${E^o}\, = \,\frac{{\,{n_2}{E^o}F\, - \,{n_1}E_1^oF}}{{nF}}$
$ = \,\frac{{\,2 \times 0.34 - 0.15}}{1}$
$=\,0.53\,V$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The positive value of $\Delta S$ indicates that
→Which of the following is correct structure of $L$ -alanine ?
→Arrange the following in correct order of stability
Which of the following pairs has both members from the same period of the periodic table
Alkaline oxidative fusion of $\mathrm{MnO}_2$ gives $"A"$ which on electrolytic oxidation in alkaline solution produces $B. A$ and $B$ respectively are:
→Molecular formula ${C_6}{H_{12}}{O_6}$ is of
→Benzaldehyde condenses with $N, N-$dimethylaniline in presence of anhydrous $ZnC{l_2}$ to give
→$0.5$ $N$ solution of $KCl$ is isotonic with ......... solution of sugar, assuming $100\%$ dissociation for $KCl$ :- ........... $\mathrm{N}$
→The molality of $1\,M$ solution of $NaCl$ (specific gravity $1.0585\,g/ml$ ) is
→The product $X$ is
→