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The Properties of Gases
Oxygen
Physical Properties
...
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Colour |
Colourless |
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Odour |
Odourless |
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Density compared to air (heavier or
lighter) |
Slightly heavier than air |
Chemical Properties
...
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Solubility in water |
Slightly
soluble in water |
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Burning |
Oxygen gas is needed for burning or
combustion. Something that burns in air will burn five
times more ferociously in pure oxygen gas. |
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Moist pH paper |
No change |
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Red rose petals |
No change |
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Specific test |
A glowing match or wooden spill will
relight when placed in oxygen gas. |
Footnotes:
- Makes up 20% of the
gases in the air.
- Needed by the majority
of living organisms for respiration
- Is produced by green
plants as a by-product of photosynthesis;
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