Two half-cells, Pt | Fe 3+ (aq, 0.50 M), Fe 2+ (aq, 1.0 10 5 M)

Question:

Two half-cells, Pt | Fe³⁺(aq, 0.50 M), Fe²⁺(aq, 1.0 × 10⁻⁵ M) and Hg²⁺(aq, 0.020 M) | Hg, are constructed and then linked together to form a voltaic cell. Which electrode is the anode? What will be the potential of the voltaic cell at 298 K?

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