Tests

• Why is barium sulfate used in the sulfate ion test?

  It forms a white precipitate when barium ions react.
• What reagent is used to confirm barium ions?

  Dilute sulfuric acid or aqueous sulfate solution.
• What observation indicates the presence of barium ions?

  A white precipitate of barium sulfate forms.
• What reagent is used to confirm magnesium ions?

  Sodium hydroxide solution.
• What observation indicates the presence of SO2 ions?

  White precipitate f BaSO4
• What reagent is used to test for SO2 ions?

  Acidified BaCl2
• What is the observation for Ba ions?

  White precipitate formed
• What reagent is used to test for Ba ions?

  H2SO4 (aq) or Na2SO4
• What is the test for OH ions?

  Test with Mgcl2(aq) and the observation is a white ppt of Mg(OH)2
• What is the observation for Mg ions?

  White precipitate formed of Mg(OH)2
• What reagent is used to test for Mg ions?

  NaOH(aq)
• What is the observation for Cl ions?

  White precipitate formed
• What reagent is used to test for Cl ions?

  Acidified AgNO3(aq)
• What is the test for CO32 ions?

  Effervescence when HNO3 is added
• What reagent is used to test for CO3 2- ions?

  HNO3