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:

Telencephalon

Anterior division of the embryonic brain from which the cerebral hemispheres develop.

Neural Tube

An embryonic structure that develops into the brain and spinal cord.

Anencephaly

Defective development of the brain and absence of the bones of the cranium. Only a rudimentary brainstem and a trace of basal ganglia are present.

Hydrocephaly

A condition characterized by an abnormal accumulation of cerebrospinal fluid within the ventricles of the brain, leading to increased pressure.