# Problem: Calculate the standard cell potential of a Al/Al 3+ | Cd/Cd2+ voltaic cell.  Al3+ (aq) + 3e– → Al(s)      E ̊red = –1.66 V Cd2+ (aq) + 2e– → Cd(s)    E ̊red = –0.403V a) –2.11 V; nonspontaneous b) 2.11 V; spontaneous c) 1.26 V; spontaneous d) –1.26 V; nonspontaneous e) 1.257 V; non‐spontaneous

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Calculate the standard cell potential of a Al/Al 3+ | Cd/Cd2+ voltaic cell.

Al3+ (aq) + 3e → Al(s)      E ̊red = –1.66 V

Cd2+ (aq) + 2e → Cd(s)    E ̊red = –0.403V

a) –2.11 V; nonspontaneous

b) 2.11 V; spontaneous

c) 1.26 V; spontaneous

d) –1.26 V; nonspontaneous

e) 1.257 V; non‐spontaneous

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