Polarity Flashcards
1
Q
Is water polar or non-polar?
A
Polar
2
Q
What is the electronegativity of F?
A
4
3
Q
What is a dipole moment
A
The direction of the polar bond in a molecule.
4
Q
In a dipole moment, what does the arrow point to?
A
THe more electronegative atom.
5
Q
What is the difference between dipole moments in non polar and polar molecules?
A
Nonpolar molecules have symmetrical dipole moments that cancel out. Polar molecules have asymmetrical dipole moments that don’t cancel out.
6
Q
What are 2 indicators of a non-polar molecule?
A
Asymmetrical shape (lone pairs) and asymmetrical atoms.
7
Q
Is CO2 polar or non-polar?
A
non-polar.
8
Q
Is ammonia polar or non-polar?
A
Polar
9
Q
Do polar bonds always make polar molecules?
A
No
10
Q
What are the 4 steps to determine if a molecule is polar or non-polar?
A
- Draw Lewis diagram
- Determine the shape of the molecule (VSEPR)
- Use electronegativities to determine if bond dipoles exist.
- Draw the dipole vectors on the shape diagram. If they cancel it is NP, if they don’t P.
