Dissolution of a Covalent Compound<BLURT>

Dissolution of a Covalent Compound

1. In the -O-H functional group, the partial charges on the atoms are: A. O δ-; H δ+
B. O δ+; H δ-
C. O δ-; H δ-
D. O δ+; H δ+

2. Which statement correctly explains the solubility of methanol in water? A. The O-H bonds in methanol experience a strong dipole attraction to the O-H bonds in water.
B. Methanol dissociates into cations and anions, which easily dissolve into water.
C. Methanol reacts with the water molecules to produce a new chemical species.
D. Methanol molecules repel one another and naturally separate into the water.

3. How does the dissolution of a covalent compound differ from that of an ionic compound? A. Covalent compounds are only moderately soluble whereas ionic compounds are very soluble.
B. The ions in ionic compounds are attracted to and thus depend on the presence of the polar OH bonds of water, whereas the molecules of covalent compounds do not.
C. Ionic compounds dissolve to produce denser solutions than do covalent compounds.
D. The molecules of covalent compounds remain intact whereas ionic compounds dissociate into individual cations and anions.

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