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Test for sulfate ions

K004/2738

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Credit

MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY

Caption

Positive test for sulfate ions in a solution. This white precipitate of barium sulfate indicates that the original solution contains sulfate. Before this, a few drops of nitric acid were added to the test solution, followed by a few drops of barium chloride solution. The barium reacted with the sulfate to form this insoluble barium sulfate, which precipitates instantly. See clips K004 2737-9 for all the stages in this test.

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  • Duration: 00:00:12.18
  • Audio: No
  • Interlaced: No
  • Capture Format: Unknown
  • Codec: Photo - JPEG

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