AP Chemistrymediummcq1 pt
Which solute dissolves most readily in nonpolar liquid CCl4?
A.NaCl, an ionic solid
B.NH3, a polar molecule
C.I2, a nonpolar molecule
D.MgSO4, an ionic compound
Explanation
Core Concept
Like dissolves like: dissolution is favorable when solute-solvent interactions resemble those broken in the pure substances. Nonpolar iodine interacts with nonpolar carbon tetrachloride through London dispersion forces comparable to the contacts each loses on leaving its own liquid, so mixing proceeds with little energetic penalty and entropy drives it forward. Ionic or hydrogen-bonding solutes would trade strong attractions for feeble dispersion contacts, so they stay behind.
Correct Answer
CI2, a nonpolar molecule
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