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Topic: Electronegativities/activity of polyatomic ions  (Read 24417 times)

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budullewraagh

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Electronegativities/activity of polyatomic ions
« on: August 13, 2004, 12:15:28 PM »
can anybody here tell me the electronegativities/electropositivities of polyatomic and monoatomic ions? is there an activity series?
« Last Edit: August 13, 2004, 12:15:52 PM by budullewraagh »

Demotivator

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Re:Electronegativities/activity of polyatomic ions
« Reply #1 on: August 16, 2004, 09:12:31 AM »
By definition, electronegativities are limited to atoms to account for bond behavior between atoms.

budullewraagh

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Re:Electronegativities/activity of polyatomic ions
« Reply #2 on: August 17, 2004, 12:15:15 AM »
right, and bonding applies to polyatomic ions.  you know what i'm talking about. :-\

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Re:Electronegativities/activity of polyatomic ions
« Reply #3 on: August 17, 2004, 02:13:09 AM »
Not applicable. I think you may be misunderstanding reactivity of an ion versus electronegativity of a bond. Electronegativity is actually a nifty topic and I may address it in a future article.
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budullewraagh

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Re:Electronegativities/activity of polyatomic ions
« Reply #4 on: August 17, 2004, 10:17:16 AM »
you know, i did mention "activity".  got any responses for activity?

Demotivator

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Re:Electronegativities/activity of polyatomic ions
« Reply #5 on: August 17, 2004, 10:38:58 AM »
Are you familiar with the electromotive potential series for ions for oxidation reduction reactions?

budullewraagh

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Re:Electronegativities/activity of polyatomic ions
« Reply #6 on: August 17, 2004, 10:48:12 AM »
very much so.  however, i do not know how this works with polyatomics.

Demotivator

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Re:Electronegativities/activity of polyatomic ions
« Reply #7 on: August 17, 2004, 11:04:46 AM »
Well, it doesn't work if the aim of your question is bonding. But  for polyatomics  it's a measure of the ability of the element in a polyatomic to reduce, for eg.
NO3- + 4H+ +  3e- ---> NO + 2H2O  E=+.96 (nitrogen reduction)
MnO4- + 8H+  + 5e- ---> Mn2+  + 4H2O  E=+1.49 (Manganese reduction)
« Last Edit: August 17, 2004, 11:22:34 AM by Demotivator »

budullewraagh

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Re:Electronegativities/activity of polyatomic ions
« Reply #8 on: August 17, 2004, 11:36:16 AM »
may i ask where you found those figures?

also, do you have an activity series?

Demotivator

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Re:Electronegativities/activity of polyatomic ions
« Reply #9 on: August 17, 2004, 11:57:13 AM »
Here
http://www.csudh.edu/oliver/chemdata/data-e.htm
or appendixes of analytical textbooks.

An Activity series doesn't come to mind, but I'll let you know if I come across one.

budullewraagh

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Re:Electronegativities/activity of polyatomic ions
« Reply #10 on: August 17, 2004, 12:10:39 PM »
many thanks

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