2СO + O₂ = CO₂ CO₂ + 2KOH = K₂CO₃ + H₂O CO₂ + 2K⁺ + 2OH⁻ = 2K⁺ +CO₃²⁻ + H₂O CO₂ + 2OH⁻ = CO₃²⁻ + H₂O K₂CO₃ + MgCl₂ = MgCO₃ + 2KCl 2K⁺ +CO₃²⁻ + Mg²⁺ + 2Cl⁻ = MgCO₃ + 2K⁺ + 2Cl⁻ CO₃²⁻ + Mg²⁺ = MgCO₃ MgCO₃ = CO₂ + MgO