In the electrochemical cell using the redox reaction below, the cathode half-reaction is 2H (s) + Sn (s) Sn2+ (aq) + H2 (g) Select one: O A. Sn + 2e→ Sn2+ O B. Sn → Sn2+ + 2e O C. 2H+ + 2e H2 O D. 2H+ → H2 + 2e O E. Sn + 2e H2

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**Electrochemical Cell and Cathode Half-Reaction**

In the electrochemical cell using the redox reaction below, the cathode half-reaction is ______.

\(2H^+ (aq) + Sn (s) \rightarrow Sn^{2+} (aq) + H_2 (g)\)

Select one:

A. Sn + 2e⁻ → Sn²⁺

B. Sn → Sn²⁺ + 2e⁻

C. 2H⁺ + 2e⁻ → H₂

D. 2H⁺ → H₂ + 2e⁻

E. Sn + 2e⁻ → H₂

Explanation:
- The provided reaction shows an overall redox process involving the reduction of \(2H^+\) ions and the oxidation of Sn.
- To identify the cathode half-reaction, note that reduction occurs at the cathode.

Choices Analysis:
- Option A: Sn + 2e⁻ → Sn²⁺ (represents oxidation, incorrect for the cathode reaction)
- Option B: Sn → Sn²⁺ + 2e⁻ (represents oxidation, incorrect for the cathode reaction)
- Option C: 2H⁺ + 2e⁻ → H₂ (represents reduction, correct for the cathode reaction)
- Option D: 2H⁺ → H₂ + 2e⁻ (incorrect stoichiometry)
- Option E: Sn + 2e⁻ → H₂ (incorrect species involved)

Answer: C. 2H⁺ + 2e⁻ → H₂
Transcribed Image Text:**Electrochemical Cell and Cathode Half-Reaction** In the electrochemical cell using the redox reaction below, the cathode half-reaction is ______. \(2H^+ (aq) + Sn (s) \rightarrow Sn^{2+} (aq) + H_2 (g)\) Select one: A. Sn + 2e⁻ → Sn²⁺ B. Sn → Sn²⁺ + 2e⁻ C. 2H⁺ + 2e⁻ → H₂ D. 2H⁺ → H₂ + 2e⁻ E. Sn + 2e⁻ → H₂ Explanation: - The provided reaction shows an overall redox process involving the reduction of \(2H^+\) ions and the oxidation of Sn. - To identify the cathode half-reaction, note that reduction occurs at the cathode. Choices Analysis: - Option A: Sn + 2e⁻ → Sn²⁺ (represents oxidation, incorrect for the cathode reaction) - Option B: Sn → Sn²⁺ + 2e⁻ (represents oxidation, incorrect for the cathode reaction) - Option C: 2H⁺ + 2e⁻ → H₂ (represents reduction, correct for the cathode reaction) - Option D: 2H⁺ → H₂ + 2e⁻ (incorrect stoichiometry) - Option E: Sn + 2e⁻ → H₂ (incorrect species involved) Answer: C. 2H⁺ + 2e⁻ → H₂
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