Determine Which of the Following Pairs of Reactants Will Result

question 118

Multiple Choice

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25 °C.

• A)I^-(aq)+ Zn²⁺(aq); if E^o(I₂/I^-)= + 0.54V and E^o(Zn²⁺/Zn)= -0.76V
• B)Ca(s)+ Mg²⁺(aq); if E^o(Ca²⁺/Ca)= -2.76V and E^o(Mg²⁺/Mg)= -2.37V
• C)H₂(g)+ Cd²⁺(aq); if E^o(Cd²⁺/Cd)= -0.40V
• D)Ag(s)+ Sn²⁺(aq); if E^o(Ag⁺/Ag)= + 0.80V and E^o(Sn²⁺/Sn)= -0.14V
• E)Ag⁺(aq)+ Mn²⁺(aq); if E^o(Ag⁺/Ag)= + 0.80V and E^o(MnO₄^-/Mn²⁺)= +1.51V

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