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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: SHH on July 16, 2019, 04:46:55 AM

Title: Yttrium chemistry
Post by: SHH on July 16, 2019, 04:46:55 AM

Hi everyone,
I know this is a vague question, but is anyone familiar with yttrium reactivity toward arsenic compounds in solution?
I.e. under what conditions would yttrium arsenide form, if at all?  Would arsenate or arsenite ions tend to complex with it, or precipitate?

Thanks for your *delete me*

Title: Re: Yttrium chemistry
Post by: chenbeier on July 16, 2019, 08:50:46 AM

Yttrium react similar like Lanthan. So there will be precipitate of YAsO₃ or YAsO₄. There is a Landoldt -Börnstein compound:

https://lb.chemie.uni-hamburg.de/static/MF/3_As_As1_As1O.php?content=512/Q5ikLTuV

http://www.periodensystem-online.de/index.php?el=39&id=mwg

https://www.google.com/search?client=firefox-b-d&biw=1665&bih=887&ei=58UtXbD6FcGWkwW0xYR4&q=yttriumarsenate&oq=yttriumarsenate&gs_l=psy-ab.3...3127.3127..3775...0.0..0.232.232.2-1...0....1..gws-wiz.e7HSyUdA9ts

Title: Re: Yttrium chemistry
Post by: SHH on July 16, 2019, 07:19:55 PM

Thanks for the reply.  In that second link do you know what the pL value means, or the Beta value?  I'm guessing this precipitate would only form at high pH?

Title: Re: Yttrium chemistry
Post by: chenbeier on July 17, 2019, 03:29:18 AM

pl = negative logarithmen of the soloubility product,
ß = soloubility