Question

In the diagram given below the value of 'X' is:

• A. 0.325 V
• B. 0.65 V
• C. - 0.35 V
• D. - 0.65 V

Answer 1

The correct option is A 0.325 V

Given,$C{u}^{2+}+e^{-}\to C{u}^{+};E_1^0=0.15V$
$\therefore \Delta G_1^0=-1\times 0.15\times F=-0.15F$
Again,
$C{u}^{+}+e^{-}\to Cu;E_2^0=-0.5V$
$\therefore \Delta G_2^0=-1\times 0.50\times F=-0.5F$
Now,
$C{u}^{+2}+2e^{-}\to Cu;E_3^0=?\therefore \Delta G_3^0=-2\times E_3^0\times F=-2E_3^{0}FAlso,\Delta G_3^0=\Delta G_1^0+\Delta G_2^0=-0.15F-0.5F\Rightarrow -2E_3^{0}F=-0.65For{E}_3^0=\frac{0.65}{2}=0.325V$