($Cu$ નું આણ્વિય દળ $63\,u$)
where $Z\,=$ Electrochemical equivalent
Eq. wt. of copper $=\,\frac {63}{2}=31.5$
$Z\,=\,\frac {31.5}{96500}$
$W\, = \,Zit\, = \,\frac{{31.5}}{{96500}}\, \times \,1.5\, \times 10 \times 60\, = \,0.2938\,g$
$Cu^+ /Cu = + 0.52\, V$, $Fe^{3+} /Fe^{2+} = +0.7 7\, V$, $\frac{1}{2}{I_2}\left( s \right)/{I^ - }\, = + 0.54\,V,$ $Ag^+ /Ag = + 0.88\,V$.
ઉપરના પોટેન્શિયલને આધારે, સૌથી પ્રબળ ઓક્સિડેશનકર્તા જણાવો.
$(A)$ $Sn^{+4}+ 2e^{-} \rightarrow Sn^{2+}$, $E^o= + 0.15\,V$
$(B)$ $2Hg^{+2} + 2e^{-} \rightarrow Hg_{2}^{+2}$, $E^o = + 0.92\,V$
$(C)$ $PbO_2 + 4H^{+} + 2e^{-} \rightarrow Pb^{+2} + 2H_2O$, $E^o = + 1.45\,V$