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Author: Subject: Ferrates vs. perxenates
chornedsnorkack
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[*] posted on 14-9-2022 at 01:52
Ferrates vs. perxenates


Both ferrates and perxenates are renowned as simple salts which are reasonably stable in alkaline aqueous solutions, but rapidly oxidize water in weak acid already.
Ferrates reduce to Fe(OH)3, perxenates to XeO3.
Ferrates in alkaline condition are stable over +400 C and can be made in liquid saltpetre (which is how they were discovered), as well as, in aqueous alkali, by hypochlorite and hypobromite. Perxenates are formed in aqueous alkali by dismutation of XeO3.

Which of them is the stronger oxidant? At near neutral pH, does perxenate oxidize Fe(OH)3 to ferrate, or vice versa?

Also, while perxenic acid decomposes rapidly in dilute acid solutions, in concentrated acid it is easy to separate XeO4. Whereas I have not heard of successful production of H2FeO4 or FeO3. What are the reaction conditions needed for successful production of XeO4 rather than XeO3 and O2?
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PirateDocBrown
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[*] posted on 14-9-2022 at 10:11


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