Chapter 26-Carbon Dioxide

Question 1

Name the 6 properties of Carbon dioxide.

Answer 1

Odourless, colourless, tasteless, does not support combustion, is more dense than air, turns limewater milky.

Question 2

Name 4 uses for carbon dioxide.

Answer 2

Refrigeration, special effects on stage, fizzy drinks, fire extinguishers.

Question 3

Why is carbon dioxide so important?

Answer 3

Plants take it in through their leaves and use it to make food. Without it, plants would die, therefore crops would fail and all animals and humans would die.

Question 4

How is carbon dioxide formed in the laboratory?

Answer 4

The reaction between dilute hydrochloric acid and marble chips.

Question 5

What is the word equation for the laboratory preparation of carbon dioxide?

Answer 5

Calcium carbonate+dilute hydrochloric acid-calcium chloride+water+carbon dioxide

Question 6

What is the chemical equation for the laboratory preparation of carbon dioxide?

Answer 6

CaCo3+2HCl-CaCl2+H2O+CO2