Description of experiment
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Needed compounds:
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sodium bromate : NaBrO3
nitric acid : HNO3
bismuth : Bi
Class:
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elem=Br,Bi
redox
Summary:
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Bismuth(III) in aqueous nitric acid solution does not form a precipitate with
bromate ion.
Description:
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Prepare a solution of bismuth nitrate from bismuth metal and nitric acid.
Dilute the liquid somwwhat such that a 20% acid is obtained with the bismuth in
it. Add a concentrated solution of sodium bromate to the clear solution of
bismuth nitrate in nitric acid: No precipitate is formed. On longer standing no
crystalline solid is obtained. So, bismuth(III) does not form an insoluble or
only moderately soluble bromate, like some other metals do.