Using the Following Reduction Half-Reactions and Their Respective Standard Reduction

question 42

Multiple Choice

Using the following reduction half-reactions and their respective standard reduction potentials at 25°C, draw a diagram of a galvanic cell.
Cr₂O₇^2-(aq) + 14 H⁺(aq) + 6e- → 2 Cr³⁺(aq) + 7 H₂O   E° = +1.33 V
Zn²⁺(aq) + 2 e- → Zn(s)   E° = -0.763 V

• A) Zn²⁺(aq) ∣ Zn(s), H⁺(aq) || Cr₂O₇^2-(aq), Cr(s) ∣ Cr³⁺(aq)
• B) Zn(s) ∣ Zn²⁺(aq) || H⁺(aq), Cr³⁺(aq) ∣ Cr(s)
• C) Cr(s) ∣ Cr³⁺(aq), H⁺(aq), Cr₂O₇^2-(aq) || Zn(S) ∣ Zn²⁺(aq)
• D) Zn(s) ∣ Zn²⁺(aq) || Cr₂O₇^2-(aq), H⁺(aq), Cr³⁺(aq) ∣ Pt(s)
• E) Pt(s) ∣ Cr³⁺(aq), Cr₂O₇^2-(aq), H⁺(aq) || Zn²⁺(aq) ∣ Zn(s)

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