Напишите химические уравнений следующих превращений:
а) Na2CO3 -> CO2 -> CO -> CO2 -> Na(HCO3)
б) CO2 -> CaCO3 -> Ca(HCO3)2 -> CaCO3 -> CaCl2
а) Na2CO3 -> CO2 -> CO -> CO2 -> Na(HCO3)
б) CO2 -> CaCO3 -> Ca(HCO3)2 -> CaCO3 -> CaCl2
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Verified answer
а) Na₂CO₃ ⇒ CO₂ ⇒ CO ⇒CO₂ ⇒ Na(HCO₃)Na₂CO₃ + 2HCl = 2NaCl + CO₂ +H₂O
CO₂ + C = 2CO
2CO + O₂ = 2CO₂
CO₂ +Na₂CO₃ + H₂O = 2Na(HCO₃)
б) CO₂ ⇒ CaCO₃ ⇒ Ca(HCO₃)₂ ⇒ CaCO₃ ⇒ CaCl₂
CO₂ + Ca(OH)₂ = CaCO₃ + H₂O
2CaCO₃ +2H-OH = Ca(HCO₃)₂ + Ca(OH)₂
Ca(HCO₃)₂ = CaCO₃ + CO₂ + H₂O или
Ca(HCO₃)₂ + Ca(OH)₂ = 2CaCO₃ + 2H₂O
CaCO₃ + 2HCl = CaCl₂ + CO₂ + H₂O