AP Review - Dipole Moments and Molecular Polarity
1. Which of the following bonds are polar? Which is the more electronegative atom
in each polar bond?
a. P-O
b. S-F
c. Br-Br
d. O-CI
2. The iodine monobromide molecule, IBr, has a bond length of 2.49 A and a dipole
moment of 1.23 D.
a. Which atom of the molecule is expected to have a negative charge?
b. Calculate the effective charges on the I and Br atoms in IBr, in units of the
electronic charge e.
3. Does SO2 have a dipole moment? If so, in which direction does the net dipole
point?
4. The HaO molecule is polar. How does this offer experimental proof that the
molecule cannot be linear?
5. What conditions must be met if a molecule with polar bonds is nonpolar?
6. Which of the following molecules are polar? BF3, CO, CF4, NCI3, SF2
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