Determine Which of the Following Pairs of Reactants Will Result

question 23

Multiple Choice

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

• A) Sn⁴⁺(aq) + Mg(s); if E°(Sn⁴⁺/Sn²⁺) = +0.15V and E°(Mg²⁺/Mg) = -2.37V
• B) Cr³⁺(aq) + Ni(s); if E°(Cr³⁺/Cr) = -0.73V and E°(Ni²⁺/Ni) = -0.23V
• C) Zn(s) + Na⁺(aq); if E°(Zn²⁺/Zn) = -0.76V and E°(Na⁺/Na) = -2.71V
• D) Fe(s) + Ba²⁺(aq); if E°(Fe³⁺/Fe) = -0.04V and E°(Ba²⁺/Ba) = -2.90V
• E) Ni²⁺(aq) + NO(g); if E°(Ni²⁺/Ni) = -0.23V and E°(NO₃^-/NO) = +0.96V

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Definitions:

Parental Stock

The breeding animals or plants used in agriculture or aquaculture, from which offspring are produced for specific qualities or production purposes.

Sympatric Speciation

The process where new species evolve from a single ancestral species while inhabiting the same geographic region.

Separate Identities

The concept of distinguishing or individualizing characteristics that make a person, group, or entity distinct from others.

Reproductive Isolation

A collection of mechanisms, behaviors, and physiological processes that prevent the members of two different species that cross or mate from producing offspring, or ensure any offspring are sterile.