Write the reaction equation: C-CO2-Na2CO3-CO2-CaCO3

1. Combustion of carbon in a stream of oxygen:

C + O2 = CO2.

2. Reaction of carbon dioxide with alkali:

CO2 + 2NaOH = Na2CO3 + H2O.

3. The reaction of decomposition of soda ash at t = 1000 ° C.

Na2CO3 = Na2O + CO2.

4. Precipitation of calcium carbonate when passing carbon dioxide through a solution of calcium hydroxide:

Ca (OH) 2 + CO2 = CaCO3 + H2O.

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