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SCIPAD - BIG IDEAS - BOOK 2
BASIS OF CHEMICAL REACTIONS
Metals and Acids
When a metal reacts with an acid, the same types of products are always formed.
Metal + Acid Metal Salt + Hydrogen
Testing for Hydrogen Gas
Aim: To show that hydrogen gas is produced when a metal reacts with acid.
Equipment: A test tube, a boiling tube, Bunsen burner, wooden splint, a bottle of acid, a piece
of metal, safety glasses.
Method: 1. Light your Bunsen burner.
2. Add your sample of metal to your test tube. Add 2 mL of acid.
3. Carefully invert the boiling tube above the test tube containing the metal and acid
(as shown in the diagram below).
Metal and 2 mL of acid
Boiling tube inverted to
collect any gas produced.
4. Hold the test tubes together for a few minutes, allowing time for the inverted boiling
tube to fill with gas.
5. When you think the tube is full, your lab partner should light a wooden splint.
6. Carefully, but quickly, tilt the boiling tube full of gas upwards and insert the burning
splint into the mouth of the test tube.
Flaming splint
Observations:
1. Outline how you could tell a chemical reaction was occurring in the test tube.
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