1. A polar section of a molecule, which is  ---Select--- to water, is called hydrophilic (literally, \"water loving\"), and a(n)___part of the molecule, which is not expected to be attracted to water, is called hydrophobic (\"water fearing\").
2. Would the following combinations be expected to be soluble or insoluble?
(a) hydrocarbon solute and hexane
(b) nonpolar solute and nonpolar solvent
(c) ionic solute and hexane
3. The solubilities in water of several substances are listed below. Classify each of these substances as soluble, insoluble, or moderately soluble, based on the criteria presented in the text.
(a) Camphor, C 10 H 16 O (a topical anti-infective): 0.1 g per 100 mL H 2 O at 25°C
(b) Cobalt(II) fluoride, CoF 2 (a catalyst in organic reactions): 1.5 g per 100 g H 2 O at 25°C
4. The primary components of vinegar are acetic acid and water, both of which are composed of polar molecules with hydrogen bonds that link them. These two liquids will mix in any proportion. Explain why acetic acid and water are miscible.
5. What does it mean to say a solution is saturated? Describe the changes that take place at the particle level in a saturated solution of sodium chloride that contains an excess of solid NaCl. Is the NaCl still dissolving?
Solution
1) attracted, non-polar
2) Nonpolar solute dissolves in nonpolar solvent and polar solute dissolves in polar solvent.
a)soluble (both being nonpolar)
b)soluble
c)insoluble (as ionic solutes are polar)
3) solubility: if a solute has a solubility of 0.1g/mL or less, it is considered insoluble.
if a solute has a solubility of 1.0g/mL or more, it is considered soluble.
Any value between these 2 are considered sparingly soluble.
Thus.
a) camphor is insoluble in water
b)CoF 2 is soluble in water.
4) due to their polar nature and presence of inter molecular H-bonding.
5)The excess NaCl added to saturated solution acts as seeds for NaCl crystal growth, as the solution tries to restore its equilibrium.
.
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1- A polar section of a molecule- which is---Select--- to water- is ca.docx
1. 1. A polar section of a molecule, which is  ---Select--- to water, is called hydrophilic
(literally, "water loving"), and a(n)___part of the molecule, which is not expected to be
attracted to water, is called hydrophobic ("water fearing").
2. Would the following combinations be expected to be soluble or insoluble?
(a) hydrocarbon solute and hexane
(b) nonpolar solute and nonpolar solvent
(c) ionic solute and hexane
3. The solubilities in water of several substances are listed below. Classify each of these
substances as soluble, insoluble, or moderately soluble, based on the criteria presented in the
text.
(a) Camphor, C 10 H 16 O (a topical anti-infective): 0.1 g per 100 mL H 2 O at 25°C
(b) Cobalt(II) fluoride, CoF 2 (a catalyst in organic reactions): 1.5 g per 100 g H 2 O at 25°C
4. The primary components of vinegar are acetic acid and water, both of which are composed of
polar molecules with hydrogen bonds that link them. These two liquids will mix in any
proportion. Explain why acetic acid and water are miscible.
5. What does it mean to say a solution is saturated? Describe the changes that take place at the
particle level in a saturated solution of sodium chloride that contains an excess of solid NaCl. Is
the NaCl still dissolving?
Solution
1) attracted, non-polar
2) Nonpolar solute dissolves in nonpolar solvent and polar solute dissolves in polar solvent.
a)soluble (both being nonpolar)
2. b)soluble
c)insoluble (as ionic solutes are polar)
3) solubility: if a solute has a solubility of 0.1g/mL or less, it is considered insoluble.
if a solute has a solubility of 1.0g/mL or more, it is considered soluble.
Any value between these 2 are considered sparingly soluble.
Thus.
a) camphor is insoluble in water
b)CoF 2 is soluble in water.
4) due to their polar nature and presence of inter molecular H-bonding.
5)The excess NaCl added to saturated solution acts as seeds for NaCl crystal growth, as the
solution tries to restore its equilibrium.
