5 Questions
Match the anion with the correct test and result:
Chloride (Cl⁻) = Acidify the solution with dilute nitric acid (HNO₃) and add a few drops of aqueous silver nitrate (AgNO₃). White precipitate of silver chloride (AgCl) is the positive result. Bromide (Br⁻) = Follow steps 1 and 2 from Chloride testing. Pale cream precipitate of silver bromide (AgBr) is the positive result. Iodide (I⁻) = Follow steps 1 and 2 from Chloride testing. Yellow precipitate of silver iodide (AgI) is the positive result. Sulfate (SO₄²⁻) = Add a few drops of barium chloride (BaCl₂) or barium nitrate (BaNO₃) solution to the test solution. White precipitate of barium sulfate (BaSO₄) is the positive result.
Match the anion with its solubility property:
Chloride (Cl⁻) = Soluble in water and dilute acids. Bromide (Br⁻) = Soluble in water but slightly soluble in dilute acids. Iodide (I⁻) = Slightly soluble in water and dilute acids. Carbonate (CO₃²⁻) = Insoluble in water and dilute acids.
Match the anion with its distinguishing interfering anions:
Chloride (Cl⁻) = Interfering Anions: Bromide (Br⁻) and Iodide (I⁻) (distinguished by precipitate color). Bromide (Br⁻) = Interfering Anions: Iodide (I⁻) (distinguished by precipitate color). Iodide (I⁻) = Nitrate (NO₃⁻) =
Match the anion with the correct reagent for testing:
Sulfate (SO₄²⁻) = Barium chloride (BaCl₂) or barium nitrate (BaNO₃) solution Carbonate (CO₃²⁻) = Dilute hydrochloric acid (HCl) Nitrate (NO₃⁻) = Aluminium foil and sodium hydroxide (NaOH) Chloride (Cl⁻) =
Match the anion with the observed reaction during testing:
Carbonate (CO₃²⁻) = Brisk effervescence of carbon dioxide gas (CO₂) Nitrate (NO₃⁻) = Sulfate (SO₄²⁻) = Bromide (Br⁻) =
Learn about the chemical tests used to identify different anions like chloride and bromide. Understand the reactions involved in detecting specific anions and how to distinguish between them.
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