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°(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