Question

цепочка превращений CO2-->CO-->CO2--H2CO3-->Na2CO3

Answer 1

CO2+C=2CO;

2CO+O2=2CO2;

CO2+H2O=H2CO3;

H2CO3+2Na=Na2CO3+H2.

Answer 2

СaO + C = CaC2 + CO 
CaC2 + 2H2O = C2H2 + Ca(OH)2 
2C2H2 + 5O2 = 4CO2 + 2H2O 
CO2 + 12H2O = C6H12O6 + 6H2O 
C6H12O6 = C2H5OH + 2CO2 
C2H5OH + CuO = CH3CHO + Cu + H2O  
CH3CHO + [O] = CH3COOH 
CH3COOH + 2O2 = 2CO2 + 2H2O 
2Na + O2 = Na2O2 
Na2O2 +2Na = 2Na2O 
Na2O+H2O = 2NaOH 
2NaOH + H2CO3 = Na2CO3 + 2H2O 
Na2CO3 + H2O = NaHCO3 + NaOH 
HNO3 + NaHCO3 = NaNO3 + H2O + CO2

Answer 3

Chain of Transformations: CO2 -> CO -> CO2 -> H2CO3 -> Na2CO3

The given chain of transformations involves several chemical reactions that convert carbon dioxide (CO2) into sodium carbonate (Na2CO3). Let's break down each step of the transformation:

1. CO2 -> CO: The first step is the conversion of carbon dioxide (CO2) into carbon monoxide (CO). This reaction can be represented as follows: ``` CO2 -> CO + O2 ``` The reaction is typically achieved by heating carbon dioxide with a reducing agent or through other chemical processes.

2. CO -> CO2: The second step involves the conversion of carbon monoxide (CO) back into carbon dioxide (CO2). This reaction can be represented as follows: ``` CO + O2 -> CO2 ``` The reaction occurs when carbon monoxide is exposed to oxygen, resulting in the formation of carbon dioxide.

3. CO2 -> H2CO3: The third step is the conversion of carbon dioxide (CO2) into carbonic acid (H2CO3). This reaction occurs when carbon dioxide dissolves in water, forming carbonic acid. The reaction can be represented as follows: ``` CO2 + H2O -> H2CO3 ``` Carbonic acid is a weak acid that forms when carbon dioxide reacts with water.

4. H2CO3 -> Na2CO3: The final step involves the conversion of carbonic acid (H2CO3) into sodium carbonate (Na2CO3). This reaction can be achieved by reacting carbonic acid with sodium hydroxide (NaOH). The reaction can be represented as follows: ``` 2H2CO3 + 2NaOH -> Na2CO3 + 2H2O + CO2 ``` Sodium carbonate is formed along with water and carbon dioxide as byproducts.

It's important to note that the given chain of transformations is a simplified representation of the chemical reactions involved. In reality, there may be additional steps or variations in the reaction conditions.

I hope this explanation helps! Let me know if you have any further questions.