Chemical Forums
Specialty Chemistry Forums => Other Sciences Question Forum => Topic started by: budullewraagh 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?
-
By definition, electronegativities are limited to atoms to account for bond behavior between atoms.
-
right, and bonding applies to polyatomic ions. you know what i'm talking about. :-\
-
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.
-
you know, i did mention "activity". got any responses for activity?
-
Are you familiar with the electromotive potential series for ions for oxidation reduction reactions?
-
very much so. however, i do not know how this works with polyatomics.
-
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)
-
may i ask where you found those figures?
also, do you have an activity series?
-
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.
-
many thanks