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REDOX REACTIONS AND ELECTROCHEMISTRY
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Question
What is the oxidation half-reaction for Fe²⁺ in acidic solution?
A. Fe²⁺ + e⁻ → Fe³⁺
B. Fe³⁺ → Fe²⁺ + e⁻
C. Fe²⁺ → Fe³⁺ + e⁻
D. Fe³⁺ + e⁻ → Fe²⁺
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