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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: Greyfield on August 12, 2019, 01:52:39 AM

Title: Antimony potassium tatrate preparation
Post by: Greyfield on August 12, 2019, 01:52:39 AM

Dear all,

Please help me on this problem: Now I have to prepare antimony potassium tartrate solution for phosphorus assay, but I have only potassium hexahydroxyantimonate and potassium tartrate. Could I mix them to form what I need?

Thanks so much!!!!

Title: Re: Antimony potassium tatrate preparation
Post by: chenbeier on August 12, 2019, 05:16:46 AM

I would use tartratic acid and the potassium hexahydroxyantimonate. Do a neutralisation with it. Potassium tartrate will not react with the first compound.

Title: Re: Antimony potassium tatrate preparation
Post by: AWK on August 12, 2019, 11:47:40 AM

Note different oxidation numbers of of antimony: +3 in complex, +5 in K[Sb(OH)₆]

Title: Re: Antimony potassium tatrate preparation
Post by: chenbeier on August 12, 2019, 11:59:44 AM

Oh yeah, thats correct. >:D

 Reduction could be done with tartratic acid as well. The acid it self can be oxidised to carbondioxide, but also oxalic acid and others between.