Description of experiment
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Needed compounds:
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sulphur : S8
carbon disulfide : CS2
Class:
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elem=C,S
precipitation
Summary:
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Sulphur dissolves in carbon disulfide exceedingly easily.
Description:
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Add a spatula full of flowers of sulphur to 1 ml of carbon disulfide and swirl
the test tube: Within just a few seconds all of the sulphur dissolves and a
yellow solution is obtained. It really is remarkable to see how easily the
sulphur dissolves.
Pour the liquid in a petri dish (do this outside!): The carbon disulfide
quickly evaporates and small crystals of sulphur remain behind.
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Remark: Initially, the carbon disulfide hardly has any smell, but when it has
been in contact with the air for some time, then its smell becomes worse and
worse. The liquid in the petri dish is really foul smelling! Most likely this
is due to some reactions of carbon disulfide with humid and/or oxygen from the
air, especially in bright sunlight.