\({{\Lambda }^{o}}_{NaCl}=\Lambda _{N{{a}^{+}}}^{o}+{{\Lambda }^{o}}_{C{{l}^{-}}}=128\)
\(\Lambda _{KN{{O}_{3}}}^{o}=\Lambda _{{{K}^{+}}}^{o}+\Lambda _{NO_{3}^{-}}^{o}=111\,;\)
\(\Lambda _{NaN{{O}_{3}}}^{o}=\Lambda _{NaCl}^{o}+\Lambda _{KN{{O}_{3}}}^{o}-\Lambda _{KCl}^{o}\)
\(\Lambda _{NaN{{O}_{3}}}^{o}=128\,+\,111-152\)
\(\Lambda _{NaN{{O}_{3}}}^{o}=87\,\,s\,c{{m}^{2}}\,mo{{l}^{-1}}\)
$Pt/ M/M^{3+}(0.001 \,mol\, L^{ -1})/Ag^+(0.01\, mol\, L^{-1})/Ag$
$298\, K$ પર સેલનો $emf$ $0.421\, volt$ હોવાનું જાણવા મળ્યું છે. $298\, K$ પર અર્ધ પ્રક્રિયા $M^{3+} + 3e \to M$ નો પ્રમાણિત પોટેન્શિયલ ......... $\mathrm{volt}$ હશે .
(આપેલ છે: $298\, K$ પર $E_{A{g^ + }/Ag}^o \,=\, 0.80\, Volt$ )
$M{g^{2 + }} + 2{e^ - } \to Mg(s);\,\,E = - 2.37\,V$
$C{u^{2 + }} + 2{e^ - } \to Cu(s);\,\,\,E = + 0.33\,V$
$Cr_{(s)} | Cr^{3+}_{(0.1\,M)} | | Fe^{2+}_{(0.01\,M)} | Fe;$
$E^0_{{cr}^{3+} |Cr} = -0.72 \,V,$ $ E^{0}_{{Fe}^{2+}{| Fe}}$ $= -0.42 \,V$