ElectrochemistryHard

Question

Given that EoK+/K = - 2.93V; EoFe2+/Fe = - 0.44V ; EoZn2+/Zn = - 0.76V ; EoC+2/Cu = 0.34V;
Based on this Data, which of the following is the strongest reducing agent ?

Options

A.Cu(s)
B.K+(aq)
C.Zn2+(aq)
D.Fe(s)

Solution

K+(aq) and Zn2+(aq) can not lose electron (s). Fe has greater tendency to lose electrons than Cu.
[EFe/Fe2+ = 0.44V > ECu/Cu2+ = - 0.34V]

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