Chemistry
JAMB 1980
Which of the following tests would confirm-unequivocally that a solution X contain the sulphate ion if it gives with?
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A.
silver nitrates solution, a white precipates insoluble in dilute HNO3
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B.
barium chloride solution, a white precipitate insoluble in dilute H2SO4
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C.
barium chloride solution, a white precipitate soluble in dilute HCl
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D.
barium chloride solution a white precipitate soluble in dilute ammonia
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E.
barium chloride solution a white precipitate insoluble in dilute HCl
Correct Answer: Option E
Explanation
Sulfate ions in solution are detected using barium chloride solution.
The test solution is acidified using a few drops of dilute hydrochloric acid, and then a few drops of barium chloride solution are added.
A white precipitate of barium sulfate forms if sulfate ions are present.
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