How is CO₂ obtained/ Reaction Tendencies 

There are many reaction through which one can obtain carbon dioxide. some of them can be found below. 

If carbon is burned in an excess of oxygen then carbon dioxide will be formed. Many metal carbonates free CO₂ when they are heated. Calcium carbonate (CaCO₃) produces carbon dioxide and calcium oxide (CaO). the reaction is shown below.

 CaCO₃ + heat = CO₂ + CaO

The fermentation of glucose (a sugar) during the preparation of ethanol, the alcohol found in beverages such as beer and wine, produces large quantities of CO₂ as a by-product.

 C₆H₁₂O₆  2C₂H₅OH + 2CO₂  = glucoseethanol

 In the laboratory CO₂ can be prepared by adding a metal carbonate to an aqueous acid; 

e.g.: CaCO₃ + 2H₃O+  Ca₂+ + 3H₂O + CO₂.

Carbon dioxide is soluble in water. It is virtually incombustible though.