![]() When a monograph specifies that an article responds to the test for dry chlorides, mix the solid to be tested with an equal weight of manganese dioxide, moisten with sulfuric acid, and gently heat the mixture: chlorine, which is recognizable by the production of a blue color with moistened starch iodide paper, is evolved. Add ammonia TS dropwise to this precipitate. Pricipitate forms Precipitate does not form NaNO3 + NaBr Fe (NO3)2 + Na2SO4 AgNO3 + NaC104 AgNO3 + NaCl Mg (NO3)2 + NaOH Pb (NO3)2 + Nal Fe (NO3)2 + Na3PO4 Answer Bank. Wash the precipitate with three 1-mL portions of nitric acid solution (1 in 100), and discard the washings. Centrifuge the mixture without delay, and decant the supernatant layer. When testing amine (including alkaloidal) hydrochlorides that do not respond to the above test, add one drop of diluted nitric acid and 0.5 mL of silver nitrate TS to a solution of the substance being examined containing, unless otherwise directed in the monograph, about 2 mg of chloride ion in 2 mL: a white, curdy precipitate is formed.
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