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On the basis of the following E° values, the strongest oxidizing agent is: [Fe(CN)6]3– → [Fe(CN)6]4– + e–; E° = –0.35 V Fe2+ → Fe3+ + e–; E° = –0.77 V

1. [Fe(CN)6]4–
2. Fe2+
3. Fe3+
4. [Fe(CN)6]3–

Correct answer: [Fe(CN)6]3–

Solution

The strongest oxidizing agent is the species with the highest (most positive) reduction potential. Here, [Fe(CN)6]3– has a reduction potential of -0.35 V, which is higher than Fe2+ (-0.77 V). Thus, [Fe(CN)6]3– is the strongest oxidizing agent.

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