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Gases Index

The Properties of Gases Home Page
Collecting Gases
The Preparation of Gases in the Laboratory

The Chapters Index

 

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.

 

 

THE LANGUAGE OF CHEMISTRY

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The Properties of Gases

 

Oxygen

Physical Properties

Chemical Properties

Oxygen gas

Colour

Colourless

Odour

Odourless

Density compared to air (heavier or lighter)

Slightly heavier than air

Solubility in water

Slightly soluble in water

Burning

Oxygen gas is needed for burning or combustion. Something that burns in air will burn five times more ferociously in pure oxygen gas.

Moist pH paper

No change

Red rose petals

No change

Specific test

A glowing match or wooden spill will relight when placed in oxygen gas.

 

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