1 nitrate ion, NO3^-
2. AgNO3 test shows either Cl^-, Br^-, or I^- present. Oxidation with Cl2 water and mixing with hexane shows either Br^- or I^-. The hexane solvent is purple if I^- so the anion must be Br^-.
Write the formula of the anion present (i.e. anions are charged; do not write compounds) in these unknowns as indicated by these test results.
1) An unknown was mixed with ammonium hydroxide and then barium chloride. Nothing happened. A fresh portion was mixed with nitric acid and silver nitrate and again nothing happens. A third portion was treated with sulfuric acid and no odor was detected. Upon addition of ferrous sulfate and concentrated sulfuric acid, a purple-brown discolorization was seen.
2) An unknown was mixed with ammonium hydroxide and barium chloride. Nothing happened. A fresh portion was mixed with nitric acid and silver nitrate, whereupon a precipitate formed. A third portion was treated with chlorine water, followed by mixing with hexane. The hexane layer turned yellow, then gradually light brown upon further mixing.
Please help!!!
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