Recall: The theory of like dissolves like states that compounds with similar intermolecular forces or polarity dissolve each other. The types of intermolecular forces possible are:
– Ion-dipole interaction: the strongest type; occurs between ions from ionic compounds and dipole moments from polar covalent compounds.
– Hydrogen bonding: occurs when H is bonded to an electronegative atom such as N, O, F.
– Dipole-dipole interaction: occurs between polar covalent compounds.
– London dispersion forces: the weakest type; occurs between nonpolar covalent compounds.
Which of the following pairs of substances would you expect to form homogeneous solutions when combined?
(a) CCl4 and H2 O
(b) KCl and H2O
(c) Br2 and CCl4
(d) CH3 CH2OH and H2O
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