Dipole Moment

(Polar molecules, Non-polar molecules, etc.)

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Jessica Lutz 2E
Posts: 56
Joined: Fri Sep 29, 2017 7:04 am

Dipole Moment

Postby Jessica Lutz 2E » Tue Nov 14, 2017 3:19 pm

I'm confused on how you can tell which direction the dipole moments of each atom in a molecule go. Can anyone clarify that concept?

Hyein Cha 2I
Posts: 103
Joined: Fri Sep 29, 2017 7:05 am
Been upvoted: 1 time

Re: Dipole Moment

Postby Hyein Cha 2I » Tue Nov 14, 2017 3:40 pm

The element with higher electronegativity (higher pull for electrons) will have negative sign, and the element with lower electronegativity (less pull for electrons) will have positive sign. It makes sense, because if you want 'negative' more strongly, you will have partially negative sign. For example, in a water molecule, H2O, Oxygen has higher electronegativity, thus has a partial negative charge, whereas Hydrogen has partial positive charge.

Jingyi Li 2C
Posts: 56
Joined: Fri Sep 29, 2017 7:06 am

Re: Dipole Moment

Postby Jingyi Li 2C » Wed Nov 15, 2017 11:46 am

The more electronegative atom will have a partial negative charge, and the less electronegative atom will have an equal but partial positive charge. When we draw an arrow to represent this, we draw it from the positive charge pointing to the negative charge (δ+ to δ-).

Amy Zheng 2l
Posts: 57
Joined: Fri Sep 29, 2017 7:04 am

Re: Dipole Moment

Postby Amy Zheng 2l » Wed Nov 15, 2017 12:35 pm

Its from the less electronegative atom to the more electronegative atom. So arrow goes from + ---> -


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