A certain electrochemical cell has for its cell reaction: Ag(s) + Zn²⁺(aq) → Ag⁺(aq) + Zn(s)
Which is the half-reaction occurring at the anode?
- Zn²⁺(aq) + 2e⁻ = Zn(s)
- Ag(s) → Ag⁺(aq) + e⁻
- Zn(s) + e⁻ = Zn(aq)
- Ag(s) + 2e⁻ = Zn(s) + O²⁻