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 The Properties of Gases

Hydrogen sulphide gas

 

Physical Properties
...

Colour Colourless
Odour Pungent odour of rotting eggs
Very poisonous
Density compared to air (heavier or lighter) Heavier than air.

Chemical Properties
...

Solubility in water Slightly soluble in water. It reacts with water to form a weak acid.
Burning Will burn in air to form sulphur and water or sulphur dioxide gas and water
Moist pH paper Slight acidic reaction
Red rose petals No reaction
Specific test None (Its odour is specific enough!)

Footnotes:

  • Found in gases from volcanoes
  • Can be produced when the bodies of dead organisms decay
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