Metal Carbonates and Acid

Testing for Carbon Dioxide Gas

Aim:

To show that carbon dioxide gas is produced when a metal carbonate reacts with acid.

Experiment 1:

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. 

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.

Observation:
It took out the flame. Because of the carbon dioxide.

Experiment 2:

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. Bubble gas into 10ml of Limewater

Observation:
The limewater started to bubble a little and the limewater became cloudy. because CO2 is present.