8.8: Bond and Molecular Polarity

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Bond and Molecular Polarity

Exercise \(\PageIndex{1}\)

If a molecule has a positive and negative end, the molecule is said to have a(n) ________ moment.

Answer: dipole

Exercise \(\PageIndex{1}\)

Which of the following molecules is nonpolar?

sulfur dioxide, SO₂
hydrogen fluoride, HF
phosphorus trifluoride, PF₃
boron trifluoride, BF₃
iodine trichloride, ICl₃

Answer: d. boron trifluoride, BF₃

Exercise \(\PageIndex{2}\)

Which of the following molecules is polar?

a. CS₂ b. SO₂ c. XeF₂ d. XeF₄ e. SO₃

Answer: b. SO₂

Exercise \(\PageIndex{3}\)

Three possible structures of C₂H₂Cl₂ are shown below. Which of these molecules are polar?

8.8.3.png

a. 1 only b. 2 only c. 3 only d. 1 and 3 e. 2 and 3

Answer: d. 1 and 3

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