Experiments for 'antimony sesquioxide'
Below follows a summary of all experiments, matching your search. Click one of the EXPERIMENT hyperlinks for a complete description of the experiment.
Results for 'antimony sesquioxide':
EXPERIMENT 1
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Antimony (III) is oxidized by dichromate in acidic environments.
EXPERIMENT 2
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Antimony (III) is supposed to form a stable complex with tartaric acid or
tartrates. This experiment does not show such behaviour. Apparently the
conditions must be selected carefully in order to create the antimony/
tartrate complex.
EXPERIMENT 3
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Sulfide is capable of forming a brightly coloured compound with antimony
(III) in a strongly acidic environment. The sulfide is not destroyed by
strong acid and is not converted to hydrogen sulfide gas.
EXPERIMENT 4
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Sulfide is capable of dissolving sulphur, forming intensely colored poly-
sulfide species. These poly-sulphide species react with antimony (III) in
strongly acidic environments, resulting in two different types of
precipitates.
EXPERIMENT 5
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Antimony sesquioxide does not dissolve in a concentrated solution of NaOH
nor does it react with sulfide or one of the polysulfides in strongly
alkaline environments.
EXPERIMENT 6
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Antimony trioxide dissolves in hydrochloric acid, giving a colorless solution.
When hydrogen sulfide is passed through such a solution, then a small amount of
a yellow precipitate is formed and the liquid becomes very pale yellow.
On dilution, much more precipitate is formed and the surprisingly, the color
shifts from pale yellow to orange. The orange solid must be hydrous Sb2S3.
EXPERIMENT 7
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Antimony trioxide does not dissolve in concentrated nitric acid, not even when
the liquid is heated to boiling. When some hydrochloric acid is added as well,
then it quickly dissolves, producing a colorless gas as well. It is oxidized to
the +5 oxidation state.
When this solution is diluted, then a white precipitate is formed. This white
precipitate must be hydrous Sb2O5. When a dilute solution of sodium sulfide is
added to this still strongly acidic solution, then H2S bubbles out of solution,
but also a lot of precipitate is formed, which has a beautiful bright
orange/red color.
EXPERIMENT 8
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A clock reaction that precipitates antimony sulfide.
End of results for 'antimony sesquioxide'