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.

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