Cell Potential and Free Energy

AP Chemistry· difficulty 3/5

Standard reduction potentials are listed at 25°C.

Half-reaction E° (V) F₂ + 2e⁻ → 2F⁻ +2.87 Cu²⁺ + 2e⁻ → Cu +0.34 2H⁺ + 2e⁻ → H₂ 0.00 Zn²⁺ + 2e⁻ → Zn -0.76 Li⁺ + e⁻ → Li -3.04

According to the table, which species is the strongest oxidizing agent?

  • A

    Zn²⁺

  • B

    F₂

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  • C

    Cu²⁺

  • D

    Li⁺

Explanation

The most positive reduction potential identifies the strongest oxidizing agent; F₂ at +2.87 V is most easily reduced and thus the best oxidizer.

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