Testing for Carbon Dioxide Gas

Testing for Carbon Dioxide Gas

Aim:To show that carbon  dioxide  gas is produced when a metal carbonate react with acid.

Equipment: Two boiling tubes,delivery tube and bung,Bunsen burner,test tube rack,wooden splint, a bottle of acid,small  amount of  metal carbonate, test tube tongs, safety glasses.

Method: 1.Light your Bunsen burner.

2.Add a 'pea-sized' amount of the metal carbonate into one of the boiling tubes.

3. Place this boiling tube into a test tube rack.Ensure you have the bung and delivery tube ready.

4.Add 5mL of acid to the boiling tube and quickly insert the bung and delivery tube into the mouth of the boiling tube.

5. Holding the other boiling tube with your tongs,capture the gas produced as shown in the diagram 

6.When  you think the tube is full,your lab partner should light a wooden splint.

7. Carefully remove the boiling tube from under the delivery tube,taking care to keep it facing upright.

8. Insert the burning splint into the mouth of the test tube.