[CHM 112] Intermolecular Forces

[Andrew J. Pounds]

On 06/30/13 16:24,  wrote:
>
> Hey Dr. Pounds,
>
> Can you explain ion-ion and induced dipole a little more in depth?
>
> Also, what type of questions should we be expecting for multiple 
> choice? Is it going to more problems just in multiple choice form or 
> more in-depth wordy type of questions?
>
> Thank you
>
In an ion-ion scenario you have -- TWO IONS.   If it is attractive then 
one will have a positive charge and one will have a negative charge.

In the case of the induced dipole you will have either an ion or a 
dipole interacting with something that, by itself, does not have any 
"charge".   In the examples I drew on the board for the item that was 
having a charge induced upon itself was a noble gas with a large number 
of electrons.   When the noble gas atom came into close proximity of 
either a ion or a dipole, the electrons "shifted" under the influence of 
the small electric field.   Since the electrons changed their spacial 
distribution within the noble gas atom, it too now exibits a small 
dipole that was induced.

-- 
Andrew J. Pounds, Ph.D.  (pounds_aj at mercer.edu)
Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627
http://faculty.mercer.edu/pounds_aj

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