CHEMISTRY THE OF SOLUTES AND SOLUTIONS
Chapter 14 Outline
Probs:
Sect.
6, 7, 27, 28, 30, 35, 37, 38, 40, 41, 43, 46, 48, 54
+ Supplementary Questions (attached)
Title and Comments
Required?
1.
Solubility and Intermolecular Forces
YES
2.
Enthalpy, Entropy and Dissolving Solutes
YES
3.
Solubility and Equilibrium
Well just cover the basic concepts of unsaturated, saturated
and supersaturated solutions.
4.
Temperature and Solubility
YES
5.
Pressure and Dissolving Gases
YES
6.
Solution Concentration: Keeping Track of Units
YES
7.
Vapor Pressures, Boiling Points, Freezing Points
and Osmotic Pressures of Solutions
YES
BRIEFLY
Note: When covering Osmotic Pressure, we will add discussions of Osmotic Shock
and of Reverse Osmosis.
NOTE: You are encouraged to study the Sample Exercises in the sections.
Often in class, we will work alternative examples instead, in order to give you a
wider range of worked problems.
CHAPTER 14
SUPPLEMENTARY HOMEWORK QUESTIONS
1. The process of dissolving is favored if the
interactions are weaker than the
interations.
a. solute-solvent; solute-solute and solvent-solvent
b. solvent-solvent; solute-solute and solute-solvent
c. solute-solute and solvent-solvent; solute-solvent
d. solute-solvent and solvent-solvent; solute-solute
e. solute-solute; solute-solvent and solvent-solvent
2. Two liquids which mix together in all proportions said are to be
a. miscible; their intermolecular interactions are dissimilar
b. miscible; their intermolecular interactions are similar
c. miscible; their densities are dissimilar
d. immiscible; their intermolecular interactions are similar
e. immiscible; their intermolecular interactions are dissimilar
; they mix because _____.
3. The concentration unit one part per billion ( one ppb) is equivalent to one
of solution.
a. mg; g
b. g; g
c. mg; kg
d. g; kg
e. ng; kg
of solute per
4. If 750 mL of a certain solution contains 50.0 g Na2SO4, the sodium ion concentration, [Na+], is
a. 0.264 M
b. 0.315 M
c. 0.469 M
d. 0.560 M
e. 0.939 M
5. The freezing points of the following aqueous solutions, from highest to lowest, are:
0.25 m glucose, C6H12O6
a. C6H12O6 > NH4NO3 > CaCl2
b. C6H12O6 > CaCl2 > NH4NO3
c. CaCl2 > C6H12O6 > NH4NO3
d. CaCl2 > NH4NO3 > C6H12O6
e. NH4NO3 > C6H12O6 > CaCl2
0.15 m CaCl2
0.20 m NH4NO3
6. A sample of the strong electrolyte, potassium phosphate (K3PO4) is dissolved in 400 grams of water.
The boiling point of the solution is 102.65 oC. How many moles of K3PO4 are contained in the
mixture?
7. An aqueous solution of phosphoric acid, H3PO4, contains 285 g H3PO4 in 400 mL solution, and has
a density of 1.35 g/mL. Calculate
(a) the weight % H3PO4 in this solution.
(b) the concentration in mol/L of this solution