Carbon Dioxide

Question 1

What is the chemical equation for making Carbon dioxide in the lab?

Answer 1

CaCo3 + 2HCI —> CaCl2 + H2O + Co2

Question 2

What is the word equation for making carbon dioxide in the lab?

Answer 2

Calcium Carbonate + Hydrochloric Acid —> Calcium Chloride + Water + Carbon Dioxide

Acid + Carbonate —> Salt + Water + Carbon Dioxide

Question 3

What are four physical properties of carbon dioxide?

Answer 3

1. Colourless, Odourless, Tasteless Gas
2. Slightly Soluble in water
3. More Dense then Air
4. Turns Limewater Milky

Question 4

What are the uses of carbon dioxide?

Answer 4

Used in:

• Fizzy Drinks: Dilute carbonic acid under pressure
• Fire Extinguishers: Does not support combustion & puts out fires
• Refrigeration: Under pressure, turns into a white solid (dry ice -78*C) which sublimes (changes from a solid to a gas). It cools food.
• Special Effects on Stage: Dry ice produces mist when put in water

Question 5

What are three chemical properties of Carbon dioxide?

Answer 5

1. Does not Support Combustion
2. Turns Limewater Milky (characteristic test)
3. Dissolves in Water to form Carbonic Acid