dipole

[Ruiting Jia 4D]

in my understanding, a dipole is closely related to polarity - are there instances where a dipole would exist where polarity did not?

[Hailey Boehm 2H]

A dipole is charge separation. This is reliant on electronegativity. A large enough difference in electronegativity makes a molecule polar. When a molecule has no dipole moments, then it is not polar. A polar molecule has a net dipole (charge separation) because of the presence of opposing charges from polar bonds that are asymmetrical in the molecule.

[StudentD2B]

Dipole moments can exist where polarity does not if they cancel each other out due to molecular geometry in a polyatomic molecule. For example CO2. The oxygen is more electronegative, but the C-O bonds are Both linear so they cancel each other out. If you have version 7 of the textbook there is a chart that shows more molecules like this.

[LG2019]

Do we need to know how to draw dipoles for the test?

[Hannah Pham 1D]

Dipoles can cancel each other out so the molecule would not be polar.

[isarose0]

Dipoles occur due to partial charges on atoms in molecules

[Ruiting Jia 4D]

Do we need to know how to draw dipoles for the test?

Yes, and I believe it will also be on the final.