Chemical Forums

Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: McCoy on September 14, 2010, 09:29:50 AM

Title: separation Al3+ from Fe3+
Post by: McCoy on September 14, 2010, 09:29:50 AM
Hi guys, I'm back with my silly questions:)
Could someone please suggest how to separate Aluminium chloride from iron chloride.
I'm thinking of something that will form a complex with one and not with the other(but nothing comes into my mind).Ammonia, no. oxalate, no. EDTA no.  I'm lost guys.
Help appreciated.
Title: Re: separation Al3+ from Fe3+
Post by: bardeus on October 02, 2010, 10:52:40 AM
I suggest you to use lots of NaOH:

Fe3+ + 3OH- -> Fe(OH)3 which is solid

Al3+ + 6OH- -> [Al(OH)6]3- which is liquid complex.

next step would be to centrifugate your mixture and separate solid from liquid.

Title: Re: separation Al3+ from Fe3+
Post by: Mr Lead on October 03, 2010, 08:52:45 AM
Is the separation for a quantitative of qualitative analyse?
I have a good test for the rigorous  Iron and Aluminium separation.