neo007 Posted April 19, 2005 Share Posted April 19, 2005 Hope someone can help me on this one. I have an unknown substance, but i'm quite sure that its Fe(3+), and it is treated to 1.0cc of dilute hydrochloric acid and then 0.6cc of aqueous chlorine. When i carried out this in the lab, nothing happened, the colour of the solution remained the same. What is this testing for? ..any help appreciated. Link to comment Share on other sites More sharing options...
Skye Posted April 20, 2005 Share Posted April 20, 2005 I imagine it's testing for the substitution of the H2O ligands by Cl. Have you done anything on the spectrochemical series? Link to comment Share on other sites More sharing options...
neo007 Posted April 20, 2005 Author Share Posted April 20, 2005 That sounds plausible, however i also know that Cl- ions are already present in the solution because the same solution was tested with dilute nitric acid and then silver nitrate. The result was that a white precipitate formed. This would indicate that Cl- ions were present in the solution. This would suggest that the Fe3+ has Cl-ligands right? BUT...i also know that the Fe3+ complex undergoes deprotonation. So...would [Fe(H20)3(Cl-)3](3-) seem to be the unknown solution(assuming an octahderal complex exists)? Link to comment Share on other sites More sharing options...
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