During the molecular modeling lab, you were told to consider the importance that molecular geometry has on polarity. Which of the following list of molecules would you classify as polar? [Hint: It may be helpful to sketch the structures to determine polarity.] I. PF5 II. SF4 III. SiO2 IV. H2S V. CI2 O II + IV O I + III O III + IV O IV + IO III

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10-12-2022
Chemistry

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During the molecular modeling lab, you were told to consider the importance that molecular geometry has on polarity. Which of the following list of molecules would you classify as polar? [Hint: It may be helpful to sketch the structures to determine polarity.] I. PF5 II. SF4 III. SiO2 IV. H2S V. CI2 O II + IV O I + III O III + IV O IV + IO III

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kjuli1766 kjuli1766 · Answer 1 · 2022-12-19T12:14:22+01:00

Molecules (II) and (IV) that is SF4 and H2S are polar.

In polar molecules, the electron density is unevenly distributed throughout the molecule, resulting in some regions of negative charge and some regions of positive charge. Molecular polarity depends on both individual bond polarities and molecular geometry, the latter of which can be predicted using his VSEPR theory.

Reason :

In molecule (I), molecule is symmetrical all polar bond cancel out polarity of each other so molecule is non-polar.

In molecule (II), molecule is asymmetrical, having a lone pair so molecule is polar.

In molecule (III), molecule is linear, bond polarity cancel out each other, so molecule is non-polar.

In molecule (IV), molecule is bent (asymmetric) having two lone pair, molecule is polar.

In molecule (V), no bond polarity, hence molecule is non-polar.

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