AgCl(s) + H₂C₂O₄(aq) → Ag(s) + CO₂(g) + Cl ^–(aq)

acidic environment

[AgCl(s) + e^– → Ag(s) + Cl ^–(aq)] × 2

H₂C₂O₄(aq) → 2 CO₂(g) + 2 H⁺(aq) + 2 e^–

sum and eliminate electrons

2 AgCl(s) + H₂C₂O₄(aq) → 2 Ag(s) + 2 CO₂(g) + 2 Cl ^–(aq) + 2 H⁺(aq)