Carry out the transformations according to the scheme: 1) Al4C3 → CH4 → CO2 → CaCO3

Carry out the transformations according to the scheme:
1) Al4C3 → CH4 → CO2 → CaCO3 → Ca (HCO3) 2 → CaCO 3
2) Ca → CaC2 → Ca (OH) 2 → CaCO3 → CO2 → C
3) CO2 → H2CO3 → Na2CO3 → CO2 4) CaCO3 → CO2 → NaHCO3 → Na2CO3

1) Al4C3+H2O=Al(OH)3+CH4
CH4+O2=CO+H2
CO2+CaO=CaCO3
CaCO3+H2CO3=Ca(HCO3)2
Ca(HCO3)2=CaCO3+CO2+H2O
2)Ca+2C=CaC2
CaC2+H2O=Ca(OH)2+C2H2
Ca(OH)2+CO2=CaCO3+H2O
CaCO3=CaO+CO2
CO2=C+O2
3)CO2+H2O=H2CO3
H2CO3+2NaOH=Na2CO3+H2O
Na2CO3=CO2+Na2O
4)CaCO3=CO2+CaO
CO2+NaOH=NaHCO3
NaHCO3+NaOH=Na2CO3+H2O



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