Determine which of the following pairs of reactants will result in a spontaneous reaction at 25 °C.
A) I-(aq) + Zn2+(aq) ; if E°(I2/I-) = + 0.54V and E°(Zn2+/Zn) = -0.76V
B) Ca(s) + Mg2+(aq) ; if E°(Ca2+/Ca) = -2.76V and E°(Mg2+/Mg) = -2.37V
C) H2(g) + Cd2+(aq) ; if E°(Cd2+/Cd) = -0.40V
D) Ag(s) + Sn2+(aq) ; if E°(Ag+/Ag) = + 0.80V and E°(Sn2+/Sn) = -0.14V
E) Ag+(aq) + Mn2+(aq) ; if E°(Ag+/Ag) = + 0.80V and E°(MnO4-/Mn2+) = +1.51V
Correct Answer:
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