Cations - Positive ions , Carbonate ion test - Add to HCl and bubble gas through limewater, Sulfate ion test - Add to HCl and follow with barium chloride solution, Halide test - Add to HNO3 and follow with silver nitrate solution, Carbon dioxide gas - Turns limewater milky, BaSO4 - Forms a white precipitate and confirms the presence of sulfate ions, AgCl - Forms a white precipitate , AgBr - Forms a cream precipitate, AgI - Forms a yellow precipitate, Anion - Negative ions, AgCl precipitate - Will dissolve in dilute ammonia solution, AgBr precipitate - Will dissolve in concentrated ammonia solution, AgI precipitate - Will not dissolve in ammonia solution, HNO3 - Used to eliminate carbonate and hydroxide ions, Warm NaOH - Used to test for ammonium ions,

Ion tests A level

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