Question

7. Осущесвите превращение.

Answer 1

⊕ Ca --> CaO --> Ca(OH)₂ --> CaCO₃ --> Ca(HCO₃)₂ --> CO₂
1) Ca + O₂ = CaO₂
2) CaO + H₂O = Ca(OH)₂
3) Ca(OH)₂ + CO₂ = CaCO₃ + H₂O 
4) CaCO₃ + CO₂ + H₂O = Ca(HCO₃)₂
5) Ca(HCO₃)₂ =[t]= CaCO₃+H₂O+CO₂

⊕ CaO --> CaCO₃ --> CO₂ --> H₂CO₃ --> Na₂CO₃ --> NaCl
1) CaO + H₂CO₃ = CaCO₄ + H₂O
2) CaCO₃ =[t]= CO₂ + Н₂О 
3) CO₂ + H₂O = H₂CO₃
4) H₂CO₃ + 2Na  = Na₂CO₃ + H₂
5) Na₂CO₃ + HCl = NaCl + HCO₃

Answer 2

Спасибо