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anonymous
 one year ago
What makes a molecule polar, is it simply because of the difference of electro negativities between the atoms or is there more to it?
anonymous
 one year ago
What makes a molecule polar, is it simply because of the difference of electro negativities between the atoms or is there more to it?

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aaronq
 one year ago
Best ResponseYou've already chosen the best response.1A molecule is polar when an electric dipole moment is present, this means a separation of charge  which could be partial charges, like in water, or "full" charges like in an ionic bond.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0How small does the separation of charge have to be in order to classify the molecule as nonpolar?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1In terms of electronegativities between atoms, 0.4.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Alright. What if I had something like this dw:1442183618149:dw I think this is a alcohol that that is polar. Did I express the partial charges correctly?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And last question, how large would the electronegativity difference have to be in order for a molecule to be polar?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1the difference has to be greater than 0.4. And yes, that molecule is polar, the dipole moment is pointed like thisdw:1442184163543:dw but it's hard to see without the proper stereochemistry and the lone pairs, this is a better depiction (the arrow is coming out of the page)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0lol, sorry I did not mean to type polar, I actually meant to type ionic  how large would the diff be for it to be ionic.

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1i think it's 1.5, hold on

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1Some websites say different values, this one says <1.7 https://www.chem.wisc.edu/deptfiles/genchem/sstutorial/Text7/Tx71/tx71.html

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I vaguely remember it to be >1.7 so I'll go with that.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks for all your help!
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