Problem: Consider the following standard reduction potentials in acid solution.  Which half reaction is the most favored process thermodynamically?                                                                                                 E°(V)             A)        Al3+      + 3 e–                →          Al(s)                    –1.66             B)        AgBr(s) +   e–                 →          Ag(s) + Br –        +0.07             C)        Sn4+      + 2 e–               →          Sn2+                  +0.14             D)        Fe3+      + e–                  →          Fe2+                  +0.77             E)         O2        + 4 e –  + 4 H+     →          H2O                 +1.23

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Consider the following standard reduction potentials in acid solution.  Which half reaction is the most favored process thermodynamically?

                                                                                                E°(V)

            A)        Al3+      + 3 e                →          Al(s)                    –1.66

            B)        AgBr(s) +   e                 →          Ag(s) + Br         +0.07

            C)        Sn4+      + 2 e               →          Sn2+                  +0.14

            D)        Fe3+      + e                  →          Fe2+                  +0.77

            E)         O2        + 4 e   + 4 H+     →          H2O                 +1.23

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