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Tests for Anions
| Question | Answer |
|---|---|
| Chemical used to test for chloride ions | AgNO3 (White precipitate, AgCl, is formed) |
| Chemical used to test for Sulfate(SO4) & Sulfite(SO3) ions | BaCl2 (White precipitate, BaSO4/BaS03, is formed) |
| Chemical used to differentiate between BaSO4 & BaS03 | Dilute HCl |
| Does Barium Sulphate or Sulphite dissolve in HCl? | Barium Sulphite dissolves |
| Chemical used to test for Carbonate(CO3) & Hydrogen Carbonate (HC03) ions | Add dilute HCl, if the gas given off makes limewater cloudy C03/HCO3 is present |
| Chemical used to differentiate between HC03 & C03 | MgS04 |
| Does MgS04 react with HCO3 or CO3 to give a white precipitate? | C03, however boiling HC03 with MgSO4 gives a precipitate |
| Chemicals used to test for Nitrate ions | FeS04 and concentrated H2S04 (Brown ring forms at junction) |
| Chemicals used to test for Phosphate ions | Ammonium Molybdate and Nitric acid(HN03) are added and the solution is warmed (Yellow Precipitate is formed) |