Write the reaction equation: sodium oxide – sodium hydroxide – sodium carbonate – calcium carbonate

Write the reaction equation: sodium oxide – sodium hydroxide – sodium carbonate – calcium carbonate – calcium bicarbonate – calcium carbonate – calcium oxide

1) Sodium oxide interacts with water, and sodium hydroxide is formed:

Na2O + H2O → 2NaOH;

2) When sodium hydroxide interacts with carbon dioxide, it turns out – sodium carbonate and water:

2NaOH + CO2 → Na2CO3 + H2O;

2Na⁺ + 2OH^– + CO₂ → 2Na⁺ + CO₃^2- + H₂O;

2OH- + CO2 → CO32- + H2O;

3) Sodium carbonate reacts with sodium chloride, it turns out – a precipitate – calcium carbonate and sodium chloride:

Na2CO3 + CaCl2 → CaCO3 ↓ + 2NaCl;

2Na⁺ + CO₃^2- + Ca²⁺ + 2Cl^– → CaCO₃↓ + 2Na⁺ + 2Cl^–;

CO32 – + Ca2 + CaCO3 ↓;

4) When calcium carbonate, water and carbon dioxide interact, calcium bicarbonate is formed:

CaCO3 + H2O + CO2 → Ca (HCO3) 2;

5) Calcium bicarbonate decomposes into – calcium carbonate, water and carbon dioxide:

Ca (HCO3) 2 → CaCO3 ↓ + H2O + CO2;

6) Calcium carbonate decomposes into carbon dioxide and water:

CaCO3 → CO2 + H2O.