K2SO3 + 2HCl = 2KCl + SO2↑ + H2O
2K⁺ + SO3²⁻ + 2H⁺ + 2Cl⁻ = 2K⁺ + 2Cl⁻ + SO2↑ + H2O
SO₃²⁻ + 2H⁺ = SO2↑ + H2O
Zn(NO3)2 + 2NaOH = Zn(OH)2 ↓+ 2NaNO3
Zn²⁺ + 2NO3⁻ + 2Na⁺ + 2OH⁻ = Zn(OH)₂ ↓ + 2Na⁺ + 2NO3⁻
Zn²⁺ + 2OH⁻ = Zn(OH)₂↓
CaCl2 +2 AgNO3 = Ca(NO3)2 + 2AgCl↓
Ca²⁺ +2Cl⁻ + 2Ag⁺ + 2NO3⁻ = Ca²⁺ + 2NO3⁻ + 2AgCl↓
2Ag⁺ + 2Cl⁻ = 2AgCl↓