 Quote by Astronuc
Possibly because Na promotes OH-[/url], which would tend to favor Fe3+ - IIRC, it has to do with oxidation potential.
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I didn't study yet oxidation power. But even if Na promotes OH- it does not react, since the chemical equation is:
[tex]Fe(SCN)^{2+}[/tex] --> [tex]Fe^{3+}[/tex] + [tex]SCN^-[/tex]
But if you could explain how... Thanks
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See - Determination of the Equilibrium Constant
for the Formation of FeSCN2+
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It requires some advanced knowledges. Wikipedia gave a hand.
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One could add thiocyanic acid to the solution, but that would tend to promote FeSCN2+
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Yes. Because to add HSCN is to add SCN-. Correct?