СаСl2 → СаСО3→ СаО → СаC2 → C2Н2
CaCl₂ + Na₂CO₃ = CaCO₃↓ + 2NaCl CaCO₃ (t°C)= CaO + CO₂↑ CaO + 3C (t°C)= CaC₂ + CO↑ CaC₂ + 2H₂O = Ca(OH)₂ + C₂H₂↑