Multiple Choice
Which of the following best describes the polarity of the molecule SBr_2?
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13. Liquids, Solids & Intermolecular Forces
Molecular Polarity
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Is carbon disulfide (CS_2) a polar molecule?
A
Yes, CS_2 is polar due to its bent molecular shape.
B
No, CS_2 is nonpolar because it contains only nonpolar covalent bonds.
C
Yes, CS_2 is polar because sulfur is more electronegative than carbon.
D
No, CS_2 is nonpolar because it has a linear geometry and the bond dipoles cancel.
Verified step by step guidance1
Determine the Lewis structure of carbon disulfide (CS\_2). Carbon is the central atom bonded to two sulfur atoms with double bonds, and there are no lone pairs on the central carbon atom.
Identify the molecular geometry of CS\_2 using the VSEPR theory. Since there are two regions of electron density around the central carbon and no lone pairs, the shape is linear.
Consider the electronegativity difference between carbon and sulfur. Both atoms have similar electronegativities, so the C=S bonds are only slightly polar.
Analyze the bond dipoles in the linear molecule. Because the molecule is linear, the two bond dipoles are equal in magnitude but point in opposite directions, causing them to cancel each other out.
Conclude that since the bond dipoles cancel, CS\_2 has no net dipole moment and is therefore a nonpolar molecule despite having polar bonds.
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