Metals and Acids Reaction
Equipment: A test tube, a boiling tube, Bunsen burner, wooden splint, a bottle of acid, a piece of metal and safety glasses.
Method:
1. Light your bunsen burner.
2. Add your sample of metal to your test tube. Add 2mL of acid.
3. Carefully invert the boiling tube above the test tube containing the metal and acid (as shown in the diagram below).
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 test 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.
Observation:
The magnesium metal caused gas when Hydrochloric acid was added to it. Then the hydrogen gas from the boiling tube was set on fire with the flaming splint and the oxygen rushed inside the boiling tube which caused a loud pop. But when you've removed the boiling tube and did not insert the flaming splint quickly, it might not work. Because the oxygen escapes the tube really fast.
Magnesium metal + Hydrochloric acid (HCI) ----> Magnesium Chloride + Hydrogen gas
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| Metal carbonate + HCI = Fizzing and bubbles. |
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| Magnesium chloride + Hydrogen gas = POP! |
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