Make up the reaction equation: 1) NaHCO3 → CO2 → CaCO3 → Ca (HCO3) 2 → CaCO3 2) CO2 → CO → C

І.
1. The decomposition of sodium bicarbonate, t = 200 ° C.
2NaHCO3 = Na2CO3 + H2O + CO2.
2. Precipitation of a white precipitate in the form of calcium carbonate.
CO2 + Ca (OH) 2 = CaCO3 + H2O.
3. Passing carbon dioxide through lime water.
CaCO3 + CO2 + H2O = Ca (HCO3) 2.
4. Decomposition of bicarbonate.
Ca (HCO3) 2 = CaCO3 + CO2 + H2O.
II.
1. Reaction of carbon dioxide with hot coal.
CO2 + C = 2CO.
2. Reaction with hydrogen to reduce carbon.
CO + H2 = H2O + C.