Worksheet - Dipole Moments

Arkansas State University
Department of Chemistry
and Physics

Answers

Dipole Moments

For each of the following, determine if the molecule would have a dipole moment (polar or nonpolar):

1. Draw the Lewis Dot Structure for each

2. Determine the Electron Arrangement

3. Draw the Molecular Geometry

4. Find the electronegativities for each atom and draw an arrow along the bond toward the most electronegative element

5. If the arrows cancel each other out, the molecule/ ion is nonpolar (no dipole moment). If the arrows do not cancel, the molecule/ ion is polar (has a dipole moment)

PF₅               No dipole CS₂                No dipole BrO₃^-              Dipole

NH₄⁺     No dipole SCl₄                Dipole BrF₅                Dipole

BF₃              No dipole SCl₆                No dipole PH₃                  Dipole

NF₃             Dipole SO₄^2-               No dipole CO₃^2-               No dipole

SiCl₄            No dipole ClO₃^-               Dipole CH₂O               Dipole

NO₃^-            No dipole O₃                    Dipole CCl₄                 No dipole

AlH₃              No dipole SO₂                  Dipole SO₃                  No dipole

CO                 Dipole CHCl₃               Dipole BrF₃                 Dipole

H₂S                Dipole I₃^-                      No dipole H₃O⁺                Dipole

PF₅ No dipole	CS₂ No dipole	BrO₃^- Dipole

NH₄⁺ No dipole	SCl₄ Dipole	BrF₅ Dipole

BF₃ No dipole	SCl₆ No dipole	PH₃ Dipole

NF₃ Dipole	SO₄^2- No dipole	CO₃^2- No dipole

SiCl₄ No dipole	ClO₃^- Dipole	CH₂O Dipole

NO₃^- No dipole	O₃ Dipole	CCl₄ No dipole

AlH₃ No dipole	SO₂ Dipole	SO₃ No dipole

CO Dipole	CHCl₃ Dipole	BrF₃ Dipole

H₂S Dipole	I₃^- No dipole	H₃O⁺ Dipole