Calcium Carbonate Decomposition Experiment

The video tutorial demonstrates the decomposition of calcium carbonate by heating it over a Bunsen burner. The process results in calcium oxide and carbon dioxide. To confirm the presence of CO2, a burning wooden splint is used; if the flame extinguishes, CO2 is present, indicating a successful reaction.

What is the initial substance used in the experiment?

• Calcium oxide

• Calcium carbonate

• Carbon dioxide

• Calcium chloride

What is the purpose of heating the calcium carbonate?

• To decompose it

• To evaporate it

• To dissolve it

• To melt it

How long is the calcium carbonate heated over the Bunsen burner?

• Three minutes

• Two minutes

• Four minutes

• One minute

What are the expected products of the decomposition of calcium carbonate?

• Calcium sulfate and sulfur dioxide

• Calcium oxide and carbon dioxide

• Calcium chloride and oxygen

• Calcium hydroxide and water

Why is it difficult to distinguish between calcium oxide and calcium carbonate?

• They have different smells

• They are both white powders

• They have different textures

• They have different colors

What tool is used to test for the presence of carbon dioxide?

• A thermometer

• A pH meter

• A wooden splint

• A litmus paper

What happens to the flame of the wooden splint if carbon dioxide is present?

• It burns brighter

• It changes color

• It goes out

• It produces smoke

What does it indicate if the wooden splint flame does not go out?

• The reaction was unsuccessful

• The reaction was successful

• Carbon dioxide is present

• Calcium oxide is present

What is the final confirmation that the decomposition reaction was successful?

• The wooden splint changes color

• The wooden splint burns brighter

• The wooden splint flame goes out

• The wooden splint produces smoke