Testing for sulfur, 1 of 2. Lead acetate paper is used to test for the presence of sulfide ions (S2-) in solution. After being dipped in the solution, the paper remains white, if there are no sulfide ions in the solution (negative test, left frame). When sulfide ions are present in the solution, a reaction with lead ions Pb2+ occurs, resulting in dark brown to black insoluble lead sulfide: Pb2+ + S2- -> PbS (positive test, right frame). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Turtle Rock Scientific |
Bildgröße: | 5800 px × 4375 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |