anion | test | test result |
carbonate, CO32- | add dilute acid, then test for carbon dioxide gas | effervescence, carbon dioxide produced |
chloride, Cl– [in solution] | acidify with dilute nitric acid, then add aqueous silver nitrate | white precipitate |
bromide, Br– [in solution] | acidify with dilute nitric acid, then add aqueous silver nitrate | cream precipitate |
iodide, I– [in solution] | acidify with dilute nitric acid, then add aqueous silver nitrate | yellow precipitate |
nitrate, NO3– [in solution] | add aqueous sodium hydroxide, then aluminum foil; warm carefully | ammonia produced |
sulfate, SO42- [in solution] | acidify with dilute nitric acid, then add aqueous silver nitrate | white precipitate |
sulfite, SO32- | add a small volume of acidified aqueous potassium manganate(VII) | the acidified aqueous potassium manganate(VII) changes color from purple to colorless |
Tests for anions
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