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/sci/ - Science & Math

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7028940 No.7028940 [Reply] [Original]

Dafuck, ionic bonds?
Can someone tell me why Iron Thiocyanate has a +2 charge?
In the reaction
Fe(NO3)3 + KSCN -> KNO3 + FeSCN(+2)
Why wouldn't the Iron react with more Thiocyanate and form Fe(SCN)3?
This is really troubling me, any help would be much appreciated.

>> No.7029004

>>7028940
And yes, I know it's not balanced. But that's really just a formality, and has nothing to do with my question.

>> No.7029022

What are valence electrons and orbitals

>> No.7029106
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7029106

You're doing it in water, right? It does, but in equilibrium. If you're adding close to equal moles of Fe3+ and SCN-, then the most energetically favourable configuration is to have most of the molecules in the [Fe(SCN)]2+ form.

Here, some equilibrium constants for you to play with:
> http://chemwiki.ucdavis.edu/?title=Development_Details/Approaches/VVV_Demos/Additional_Demos/The_Fe(SCN)2%252B//_Fe(SCN)2%252B_Equilibrium---Expanded_Version