Tests for common gases, water and ions, and key practical techniques and safety.
Tests for gases
| Gas | Test | Result | |---|---|---| | Hydrogen | lit splint | squeaky pop | | Oxygen | glowing splint | relights | | Carbon dioxide | limewater | turns milky | | Ammonia | damp red litmus | turns blue | | Chlorine | damp blue litmus | bleached (white) |
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