Dipole moment as a vector  [ENDORSED]

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Kaleb Tesfaye 1I
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Dipole moment as a vector

Postby Kaleb Tesfaye 1I » Sun May 20, 2018 5:08 am

It is my understanding that electrons tend to shift towards the more positive element/ molecule. For example, for HF, the electron cloud of the F- atom will be polarized and end up shifting toward the H+ atom. Why is the dipole moment represented by an arrow pointing toward the more negative atom if electrons move in the opposite direction?

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Re: Dipole moment as a vector  [ENDORSED]

Postby Chem_Mod » Sun May 20, 2018 10:36 am

Shared electrons are pulled towards the more electronegative element. In chemistry we draw the arrow in the same direction the electrons are pulled.
Therefore in HF the dipole moment is drawn as a vector towards the F atom.

Ask me after class if more discussion is needed.

Emma Leshan 1B
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Re: Dipole moment as a vector

Postby Emma Leshan 1B » Sun May 20, 2018 1:50 pm

The partial negative results from the electrons being pulled toward the more electronegative atom, which is why the arrow points toward the partial negative: that is the way the electrons are being pulled.

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