Lesson: Chapter 12 — Electrochemistry

More simple cells 3 of 4 Reset answers

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Question 3

Which half reaction happens at the cathode of a simple cell in acid?

A 2H⁺ (aq) + 2e → H₂ (g) B Zn (s) → Zn²⁺ (aq) + 2e C Cu (s) → Cu²⁺ (aq) + 2e D Fe (s) → Fe²⁺ (aq) + 2e

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Hydrogen ions gaining electrons to form hydrogen gas. The other three are oxidations, which happen at an anode.

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