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What are Sulfates? | Chemistry for Grade 10 PDF Download

Test for Sulfates

  • Acidify the sample with dilute hydrochloric acid and then add a few drops of aqueous barium chloride
  • If a sulfate is present then a white precipitate of barium sulfate is formed:
    What are Sulfates? | Chemistry for Grade 10
  • The test can also be carried out with barium nitrate solution

A white precipitate of barium sulfate is a positive result for the presence of sulfate ionsA white precipitate of barium sulfate is a positive result for the presence of sulfate ions

Exam Tip

HCl is added first to remove any carbonates which may be present and would also produce a precipitate and  interfere with the results.

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