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Chemical tests - Coggle Diagram
Chemical tests
Other chemical test
Hydrogen (H2)
Flammable gas with low density, very explosive
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Oxygen (O2)
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insert glowing splint into tube of oxygen, should re-ignite
Carbon dioxide (CO2)
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pass carbon dioxide through limewater, if it turns cloudy white, then gas is present
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Chlorine (Cl2)
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insert damp blue litmus paper into tube of gas, if it turns pink then bleaches, it is present
Testing for anions
Sulfate
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add few drops of barium sulphate chloride solution, solution must be acidified with dilute hydrochloric acid first, white precipitate of barium sulphate will form
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Halides
Cl-, Br-, I- ions are all halides
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Testing for cations
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Ammoniums cations
No precipitate is formed
heat mixture, produces gas
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