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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: cdft on July 23, 2014, 11:58:06 AM

Title: about the materials formed in the procession of chelate solution absorbing H2S
Post by: cdft on July 23, 2014, 11:58:06 AM

when the H2S gas is bubbled into the iron chelate solution,there forms some unkown materials insoluble as well as sulphur.what are these things?Ferric hydroxy?or ferrous sulfide?Anyone knows?

Title: Re: about the materials formed in the procession of chelate solution absorbing H2S
Post by: Arkcon on July 23, 2014, 12:34:46 PM

Yes, this is most likely iron sulfide, this is a common high school assay.  You might get something weirder because of the chelate.  But iron sulfide is most likely what you're getting.

Title: Re: about the materials formed in the procession of chelate solution absorbing H2S
Post by: cdft on July 24, 2014, 11:38:08 AM

THANKS.Since there exists the chelon which can chelate the ferrous ion in the solution,how and why could the ferrous lose as the FeS precipitation as u said?Such as NTA,it chelates both ferric and ferrous stably in the solution.