Carbon Dioxide

Question 1

What is the word equation for Carbon Dioxide?

Answer 1

Calcium carbonate + hydrochloride acid –> calcium chloride + water + carbon dioxide

Question 2

What is the word equations for the test for Carbon Dioxide?

Answer 2

Limewater (calcium hydroxide) + carbon dioxide –> chalk + water

Question 3

What are the physical properties of carbon dioxide?

Answer 3

• Colourless, odourless; tasteless gas.
• Slightly soluble in water.
• More dense than air.

Question 4

What are the chemical properties of carbon dioxide?

Answer 4

• Does not support combustion.
• Turns limewater milky.
• Dissolves in water to form carbonic acid.

Question 5

What are the uses of carbon dioxide?

Answer 5

• Fizzy drinks, contain dissolved carbon dioxide under pressure.
• Fire extinguishers, it’s more dense than air and it does not support combustion.
• Refrigeration, carbon dioxide under pressure is converted to a white solid (dry ice) -78%