When a metal carbonate reats with an acid it will form a salt, carbon dioxide and water. Carbon dioxide is a gas and can be seen as bubbles as the reactions proceeds.
Aim-
-To show that carbon dioxide gas is produced when a metal carbonate reacts with acid.
Equipment-
-Two boiling tubes
-Delivery tube and bung
-Bunsen burner
-Test tube rack
-Wooden splint
-Bottle of acid
-Small amount of metal carbonate
-Test tube tongs
-Safety glasses
Method-
-Light your bunsen burner
-Add a 'pea-sized' amount of the metal carbonate into one of the boiling tubes
-Place this boiling tube into a test tube rack. Ensure you have the bung and delivery tube ready
-Add 5 ml of acid to the boiling tube and quickly insert the bung and delivery tube into the mouth of the boiling tube
-Holding the other boiling tube with your tongs, capture the gas produced.
Observation-
When the lit splint was inserted into the mouth of the test tube, the splint flame went out straight away because it was in carbon dioxide. Also it then produced smoke.
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