Zn + 2HCl = ZnCl2 + H2↑
Zn + 2H⁺ + 2Cl⁻ = Zn²⁺ + 2Cl⁻ + H2
Zn + 2H⁺ = Zn²⁺ + H2
NaOH + HCl = NaCl + H2O
Na⁺ + OH⁻ + H⁺ + Cl⁻ = Na⁺ + Cl⁻ + H2O
OH⁻ + H⁺ = H2O
AgNO3 + HCl = AgCl↓ + HNO3
Ag⁺ + NO₃⁻ + H⁺ + Cl⁻ = AgCl↓ + H⁺ + NO₃⁻
Ag⁺+Cl⁻ = AgCl
CuO + 2HCl = CuCl2 + H2O
CuO + 2H⁺ + 2Cl⁻ = Cu²⁺ + 2Cl⁻ + H2O
CuO + 2H⁺ = Cu²⁺ + H2O