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Chemical Reactions
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Anion Lab Manual

Test For Sulphate ion, SO42- and Sulphite ion, SO32-.

Experiment 2: To identify aqueous solutions containing sulphate ions and sulphite ions using barium nitrate or barium chloride solution.
SO42- (aq) ion
SO32- (aq) ion

a) Place 2 cm3 of each sample solution in a test tube. Add a few drops of barium nitrate or barium chloride solution.
Observation White ppt. formed. White ppt. formed.
Identity of precipitate formed Barium sulphate, BaSO4 Barium sulphite, BaSO3
Ionic equation Ba2+ (aq) + SO42- (aq)
----->    BaSO4 (s)

Ba2+ (aq) + SO32- (aq)
----->    BaSO3 (s)

 

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