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

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Definitions:

Compounded Quarterly

A financial calculation where interest is added to the principal four times a year, resulting in an increased amount on which subsequent interest calculations are based.

Lump Sum

A one-time transaction made at a specific moment, rather than several payments spread across a period.

Withdraw

To remove funds from a bank account or investment.

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Occurring or done every six months or twice a year.