Carbon Dioxide

Carbon dioxide, CO2, is one of two oxides of carbon, and it is the principal product oxide of carbon formed from the compustion of hydrocarbon fuels. Carbon dioxide is the focus of public concern in recent years due to the increasing concentration of this gas in the atmosphere as a result of the combustion of fossel fuels. The gas is implicated in the Greenhouse Effect.

The carbon dioxide which is present in the atmosphere is produced by respiration and by combustion. However, it has a short residence time in this phase as it is both consumed by plants during photosynthesis.


Physical Properties of Carbon Dioxide

Carbon dioxide is a colourless odourless gas, which is soluble in water, in ethanol and in acetone.



Preparation of Carbon Dioxide

Carbon dioxide is prepared


Properties of Carbon Dioxide

  1. Carbon dioxide is a linear covalent molecule.


  2. Carbon dioxide is an acidic oxide and reacts with water to give carbonic acid.
    CO2   +   H2O   ==>   H2CO3     
  3. Carbon dioxide reacts with alkalis to give carbonates and bicarbonates.
    CO2   +   NaOH   ==>    NaHCO3  
    NaHCO3   +   NaOH   ==>         Na2CO3  +  H2O  


Uses of Carbon Dioxide


Chemical Properties of Carbon Dioxide


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