Carbon(iv) oxide can undergo various changes like?
1. Combining with water to form carbonic acid:
CO2 + H2O -> H2CO3
2. Reacting with metal oxides to form metal carbonates:
CO2 + CaO -> CaCO3
3. Reacting with metal hydroxides to form metal carbonates:
2NaOH + CO2 -> Na2CO3 + H2O
4. Undergoing combustion in the presence of oxygen to produce carbon dioxide gas:
C + O2 -> CO2
5. Participating in photosynthesis by being used as a carbon source for plants:
6CO2 + 6H2O + light energy -> C6H12O6 + 6O2
6. Reacting with calcium hydroxide to form calcium carbonate:
Ca(OH)2 + CO2 -> CaCO3 + H2O
7. Forming carbamic acid when reacting with ammonia:
CO2 + NH3 + H2O -> NH2COOH + H2O
8. Combining with hydrogen gas to form methane:
CO2 + 4H2 -> CH4 + 2H2O