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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 0,04% of the gases in the air. Rainwater is slightly acidic because carbon dioxide dissolves in it.

Needed by green plants during photosynthesis.

Product of respiration in living things.

Product of combustion.

Is one of the "greenhouse" gases present in the atmosphere.

Used in fire extinguishers since it is heavier than air and forms a "blanket" around the fire. This prevents combustion since carbon dioxide does not support it and the presence of carbon dioxide stops oxygen reaching the combustible material.

 

 

THE LANGUAGE OF CHEMISTRY

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The Properties of Gases

 

Carbon Dioxide

Physical Properties

Chemical Properties

Carbon dioxide

Colour

Colourless

Odour

Odourless

Density compared to air (heavier or lighter)

Heavier than air

Solubility in water

Fairly soluble in water. It reacts with water to form a weak acid called carbonic acid.

Burning

Does not support combustion.

Moist pH paper

Shows a weak acidic reaction (around pH6)

Red rose petals

No change

Specific test

Turns lime water "cloudy"

 

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