question_answer

Write the cell reaction if the Nernst equation is given by the relation     \[{{E}_{cell}}={{E}^{o}}_{cell}\,-\frac{RT}{2F}\ln \,\frac{[P{{b}^{2+}}]}{{{[{{H}^{+}}]}^{2}}}\]

Answer:

                The two half-cell reactions may be written as: \[Pb(s)\xrightarrow{\,}\,P{{b}^{2+}}(aq)+2{{e}^{-}}\]                     (Oxidation half reaction) \[2{{H}^{+}}(aq)+2{{e}^{-}}\xrightarrow{\,}\,{{H}_{2}}(g)\]                                          (Reduction half reaction)                          __________________________________ \[Pb(s)+2{{H}^{+}}(aq)\xrightarrow{\,}\,P{{b}^{2+}}(aq)+{{H}_{2}}(g)\].