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Correct Answer: B
Correct Answer: B
Method / Topic: General Chemistry
The correct option matches the required rule and the given information.
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Correct Answer: B
Method / Topic: General Chemistry
Copper is reduced at the cathode and zinc is oxidized at the anode. Using reduction potentials, E°cell = E°cathode − E°anode = (+0.34 V) − (−0.76 V) = +1.10 V. The positive value is consistent with the stated spontaneous galvanic-cell reaction. This result follows from the balanced chemical relationship and the stated conditions; no unstated biological assumption is needed. On MCAT chemistry problems, first identify the governing principle, write the relevant equation with units, and only then substitute values. Check whether the
prevents dosage, dilution, and preparation errors.
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PASSAGE 4 — ZINC–COPPER GALVANIC CELL A galvanic cell is assembled as Zn(s) | Zn2+(aq) || Cu2+(aq) | Cu(s). Standard reduction potentials are E°(Cu2+/Cu) = +0.34 V and E°(Zn2+/Zn) = −0.76 V. The overall spontaneous reaction is Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s). At 298 K, the Nernst equation may be written E = E° − (0.0592/n)log Q. QUESTION 10: What is the standard cell potential, E°cell?
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Correct Answer: B
Method / Topic: General Chemistry
The correct option matches the required rule and the given information.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: General Chemistry
Copper is reduced at the cathode and zinc is oxidized at the anode. Using reduction potentials, E°cell = E°cathode − E°anode = (+0.34 V) − (−0.76 V) = +1.10 V. The positive value is consistent with the stated spontaneous galvanic-cell reaction. This result follows from the balanced chemical relationship and the stated conditions; no unstated biological assumption is needed. On MCAT chemistry problems, first identify the governing principle, write the relevant equation with units, and only then substitute values. Check whether the
prevents dosage, dilution, and preparation errors.
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