Unknown Chemical

Written by otrejoskweyeke / NR: Not Rated
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Arsenic: Arsenic will not form a precipitate with sulfide, because arsenic sulfide is fairly soluble in basic solution. But if the unknown solution turns yellow or orange upon the addition of sulfide, carefully lower the pH with dilute HCl. If arsenic is present, the yellow arsenic sulfide will precipitate out as a cruddy mass.

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Room 150306 created by otrejoskweyeke on Mar 7, 2019
Previous Rooms: 150301 (anion)