1. Carbon Dioxide

2. Adding acid to carbonates
Carbonates are compounds containing carbon and oxygen. When an acid is added to a carbonate the carbonate starts to fizz. A gas called carbon dioxide is produced.
Carbon Dioxide is heavier than air so it stays in the test tube. We can not see it or smell it.
Carbon
Dioxide

3. Adding acid to carbonates
Calcium Carbonate + Hydrochloric AcidCalcium Chloride+water+Carbon Dioxide
CaCO HCl  CaCl2 + H2O +CO2
The equation must be balanced
Carbon
Dioxide

4. Testing for carbon dioxide
Proves Gas is Carbon Dioxide
Gas
Limewater
Limewater turns milky/cloudy

5. Adding acid to carbonates
Calcium Hydroxide(limewater)+Carbon Dioxide Calcium Carbonate water Ca(OH)2 + CO2  CaCO3 + H2O
The equation is balanced
Gas
Proves Gas is Carbon Dioxide
Limewater
Limewater turns milky/cloudy

6. Uses of Carbon Dioxide Fire Extinguishers Fizzy Drinks
Dry Ice (Stage Effects)