Credit: 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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Keywords: acidification, acidifying, add, adding, barium, chemical, chemistry, chloride, demonstrating, demonstration, drop, dropping, education, educational, ion, ions, nitric acid, precipitate, precipitation, reacting, reaction, solution, solutions, sulfate, sulphate, test, test tube, testing

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Test for sulfate ions

K004/2738 Rights Managed

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Duration: 00:00:12.18

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