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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: ngoykhman on May 01, 2009, 08:41:11 AM

Title: complex ion Kf's
Post by: ngoykhman on May 01, 2009, 08:41:11 AM
Where can I find a list of complex- ion formation constants, particularly of FeCl4, CoCl4, CuCl4 and NiCl4? I need them for a chromatography lab report, and I can't find them anywhere.

Thank you.
Title: Re: complex ion Kf's
Post by: BluRay on May 02, 2009, 09:24:43 AM
Quote from: ngoykhman on May 01, 2009, 08:41:11 AM
Where can I find a list of complex- ion formation constants, particularly of FeCl4, CoCl4, CuCl4 and NiCl4? I need them for a chromatography lab report, and I can't find them anywhere.

Thank you.
You didn't specify the metal's oxidation number. For the M3+ chlorides I found these two data:

Reaction                                 Kdissociation complex = Kequilibrium
FeCl4-  <-->  FeCl3 + Cl-             -1.9 
CuCl4-  <--> CuCl3 + Cl-             -0.55

From: Qualitative Chemical Analysis - G.Charlot