Chapter 16 Test REVIEW
A.Matching
Match each description in Column B to the correct term in Column A.Write the letter
of the correct description on the line.
Column A_b___ 1. saturated solution
_i___ 2. colligative properties
__g___ 3. miscible
_c__ 4. molarity
_f_ 5. unsaturated solution
_d__ 6. immiscible
_j__ 7. concentrated solution
_a_ 8. molality
__h_ 9. supersaturated solution
_e__ 10. dilute solution / Column B
a. moles of solute in a given mass (kg) of solvent
b. a solution containing the maximum amount of
solute that can be dissolved at a given temperature
c. the number of moles of solute dissolved in
1 L of solution
d. describes liquids that are insoluble in each other
e. contains only a small amount of the maximum
amount of solute that can be dissolved at a given
temperature
f. contains less solute than can theoretically be
dissolved
g. describes liquids that dissolve in each other
h. contains more solute than can theoretically be held
at a given temperature
i. depend upon the number of particles of solute in
solution
j. a solution with a large amount of solute compared
to solvent
B. Multiple Choice
Choose the best answer and write its letter on the line.
______12. Which of the following operations usually makes a substance dissolve faster in a solvent?
a. agitation c. crushing the substance to a powder
b. raising the temperature d. all of the above
______15. An ionic compound has a solubility of 30 g per 100 mL of water at
room temperature. A solution containing 70 g of the compound in
250 mL of water at the same temperature is:
a. saturated. b. supersaturated. c. unsaturated. d. a suspension.
______18. What is the molarity of a 200-mL solution in which 0.2 mole of sodium
bromide is dissolved?
a. 0.20M b. 1.0M c. 0.40M d. 4.0M
______20. Which of the following is not a colligative property of a solution?
a. boiling-point elevation c. vapor-pressure lowering
b. solubilityd. freezing-point depression
C. True-False
Classify each of these statements as TRUE or FALSE.
False (only a few exceptions)__ 22. The solubility of a solute can be increased by cooling the solvent.
_true_ 23. Grinding a solute increases the rate at which it dissolves.
_true___ 24. As an open bottle of a carbonated beverage warms, the concentration
of dissolved carbon dioxide decreases
_false__ 27. As the temperature of a solvent increases, the solubility of a gaseous
solute increases.(solubility of a gas decreases as temp increases)
__true__ 30. A saturated solution has a large amount of solute compared to solvent.
.
D. Problems
Solve the following problems in the space provided. Show your work.
33. Calculate the molarity of a solution prepared by dissolving 95.5 g of KNO3 in
enough water to make 750 mL of solution.
0.945 moles M= 1.26M
36. How many grams of Na2SO4 must be added to water to create 750ml of a 2.50M solution?
x = 1.875 moles
266 grams
37. Calculate the molality of a solution prepared by dissolving 175 g of KNO3in
1250 g of water.
. Molality =
38. Using the data table below,
a)which of the compounds is most soluble at 25ºC? KI
b)Which of the coumponds has the lowest solubility at 90 ºC? Ce2(SO4)3
c)How many grams of KCl can be dissolved in 200 g of water at 90 ºC?104 g (can dissolve 52g in every 100g of water, and we have 200 g water so multiply by 2)