Anode and Cathode Half Reactions
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Questions and Answers

Which half reaction occurs at the anode during chromium plating?

  • Cr3+(aq) → Cr(s) + 3e-
  • Cr(s) → Cr3+(aq) + 3e- (correct)
  • Cr(s) + 3e- → Cr3+(aq)
  • Cr3+(aq) + 3e- → Cr(s)

    • What happens at the cathode during chromium plating?

  • Cr(s) → Cr3+(aq) + 3e-
  • Cr3+(aq) + 3e- → Cr(s) (correct)
  • Cr3+(aq) → Cr(s) + 3e-
  • Cr(s) + 3e- → Cr3+(aq)

    • What is the overall reaction for chromium plating?

  • 2Cr(s) + 3e- → Cr(s) + Cr3+(aq)
  • Cr(s) + Cr3+(aq) → 2Cr(s) + 3e- (correct)
  • Cr3+(aq) + 3e- → Cr(s)
  • Cr(s) + 3e- → Cr3+(aq)

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