CO2 - CARBON DIOXIDE

Properties of carbon dioxide:

Colorless, heavier than air and thermally stable, under compression and cooling is readily converted into liquid and solid states. Solid CO2 ("dry ice") at room temperature is sublimated. Poorly water soluble, partially reacted with it. Shows acidic properties, reacts with alkalis, ammonium hydroxide. It is recovering by active metals, hydrogen, carbon.


Molar mass g/mol 44.01
Density g/litre 1.977

Methods for preparation of carbon dioxide:

CaCO3 = CaO + CO2 (900-1200° C).

CaCO3 + 2HCl(diluted) = CaCl2 +CO2↑ + H2O.

C + O2 = CO2 (600-700° C, burning on air),


Chemical reactions with carbon dioxide:

2CO2 = 2CO + O2 (above 2000° C).

8CO2 • 46H2O(solid) = 8CO2 + 46H2O (above -21° C).

CO2(solution) + H2O = CO2 • H2O(solution) = H2CO3(solution).

CO2 + NaOH(diluted) = NaHCO3,

CO2 + 2NaOH(conc.) = Na2CO3 + H2O.

CO2 + Ba(OH)2 = BaCO3↓ + H2O,

CO2 + BaCO3(solid) + H2O = Ba(HCO3)2(solution).

CO2 + NH3 • H2O = NH4HCO3.

CO2 + 4H2 = CH4 + 2H2O (200° C, catalyst Cu2O).

CO2 + C = 2CO (above 1000° C).

CO2 + 2Mg = C + 2MgO, 2CO2 + 5Ca = CaC2 + 4CaO (500° C).

2CO2 + 2Na2O2 = 2Na2CO3 + O2 (normal temp.).


 

Did you know?

One bucketful of water contains more atoms than the Atlantic Ocean does bucketfuls of water.