Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. Which of the following is a homogeneous mixture?
a. water
c. whole wheat bread
b. a sugar-water solution
d. Sugar
____
2. All of the following are homogeneous mixtures except
a. soil.
c. gasoline.
b. a sugar-water solution.
d. a salt-water solution.
____
3. All of the following are heterogeneous mixtures except
a. whole wheat bread.
c. tap water.
b. granite.
d. an oil-water mixture.
____
4. Water in air is an example of which solute-solvent combination?
a. gas-liquid
c. liquid-liquid
b. liquid-gas
d. gas-gas
____
5. Carbon dioxide dissolved in water is an example of which solute-solvent combination?
a. gas-liquid
c. liquid-liquid
b. liquid-gas
d. cannot be determined
____
6. Sugar dissolved in water is an example of which solute-solvent combination?
a. gas-liquid
c. solid-liquid
b. liquid-liquid
d. liquid-solid
____
7. Oxygen in nitrogen is an example of which solute-solvent combination?
a. gas-liquid
c. gas-solid
b. liquid-gas
d. gas-gas
____
8. Which is not an example of a colloid?
a. paint
b. smoke
____
c. butter
d. sugar water
9. Which mixture is made up of the smallest particles?
a. milk
c. shaving cream
b. salt water
d. muddy water
____ 10. Which mixture contains visible particles that settle out unless the mixture is stirred?
a. a colloid
c. a solution
b. a homogeneous mixture
d. a suspension
____ 11. Which mixture contains particles that are in a dispersed phase and do not settle out?
a. a colloid
c. a solution
b. a homogeneous mixture
d. a suspension
____ 12. A metal solution is a(n)
a. colloid.
b. alloy.
c. suspension.
d. emulsion.
____ 13. A foam is a colloidal dispersion of
a. two liquids.
b. two solids.
c. a solid and a liquid.
d. a gas and a liquid.
____ 14. Colloids
a. can be separated by filtering.
b. settle out when allowed to stand.
c. scatter light.
d. contain particles larger than 1000 nm.
____ 15. The Tyndall effect is used to distinguish between
a. liquids and gases.
c. electrolytes and nonelectrolytes.
b. solutions and colloids.
d. solvents and solutes.
____ 16. A substance whose water solution is a good conductor of electricity is a(n)
a. nonelectrolyte.
c. nonpolar substance.
b. electrolyte.
d. solute.
____ 17. Which of the following is an electrolyte?
a. sodium chloride
b. sugar
c. pure water
d. glass
____ 18. A substance whose water solution is a poor conductor of electricity is a(n)
a. polar substance.
c. electrolyte.
b. nonelectrolyte.
d. ionic substance.
____ 19. Which of the following is a nonelectrolyte?
a. sodium chloride
c. sugar
b. hydrogen chloride
d. potassium chloride
____ 20. Which of the following will dissolve most rapidly?
a. sugar cubes in cold water
c. powdered sugar in cold water
b. sugar cubes in hot water
d. powdered sugar in hot water
____ 21. Which of the following is an example of a polar solvent?
a. carbon tetrachloride
c. water
b. benzene
d. gasoline
____ 22. Which of the following is an example of a nonpolar solvent?
a. water
c. Both (a) and (b)
b. toluene
d. Neither (a) nor (b)
____ 23. Which of the following is soluble in water?
a. potassium nitrate
c. benzene
b. silver
d. carbon tetrachloride
____ 24. Which of the following is a solvent for both polar and nonpolar solutes?
a. water
c. ethanol
b. carbon tetrachloride
d. benzene
____ 25. As temperature increases, solubility of gases in liquids
a. increases.
c. can increase or decrease.
b. decreases.
d. is not affected.
____ 26. As temperature increases, solubility of solids in liquids
a. always increases.
c. usually increases.
b. always decreases.
d. usually decreases.
____ 27. A molar solution of CaCl2 contains
a. one mole of CaCl2 for every mole of solution.
b. one mole of CaCl2 for every liter of solution.
c. one liter of CaCl2 for every liter of solution.
d. one liter of CaCl2 for every mole of solution.
____ 28. Which of the following expresses concentration?
a. molality
c. moles of solute per liter of solution
b. molarity
d. All of the above
____ 29. What is the molarity of a solution that contains 0.202 mol KCl in 7.98 L solution?
a. 0.0132 M
c. 0.459 M
b. 0.0253 M
d. 1.363 M
____ 30. What is the molality of a solution that contains 31.0 g HCl in 5.00 kg water? (molar mass of HCl = 36.46
g/mol)
a. 0.062 m
c. 0.170 m
b. 0.425 m
d. 15.5 m
____ 31. How many moles of HCl are present in 0.70 L of a 0.33 M HCl solution? (molar mass of HCl = 36.46
g/mol)
a. 0.23 mol
c. 0.38 mol
b. 0.28 mol
d. 0.47 mol
____ 32. An NaOH solution contains 1.90 mol of NaOH, and its concentration is 0.555 M. What is its volume?
(molar mass of NaOH = 40.00 g/mol)
a. 0.623 L
c. 1.05 L
b. 0.911 L
d. 3.42 L
____ 33. What mass of water must be used to make a 1.35 m solution that contains 8.20 mol of NaOH? (molar mass
of NaOH = 40.00 g/mol)
a. 6.07 kg
c. 11.1 kg
b. 7.44 kg
d. 14.5 kg
34. A solution contains 85.0 g of NaNO3, and has a volume of 750. mL. Find the molarity of the solution.
(molar mass of NaCl = 58.44 g/mol)
35. What is the molarity of a solution of sucrose, C12H22O11, that contains 125 g of sucrose in 3.50 L of
solution? (molar mass of C12H22O11 = 342.34 g/mol)
36. How many grams of NaOH are required to prepare 200. mL of a 0.450 M solution? (molar mass of NaOH
= 40.00 g/mol)
Problems
1. What mass of water must be added to 0.50 mol of glucose to make a solution of 25 percent by mass? The
molar mass of glucose is 180 g/mol.
2. What is the percent by mass of glucose in a solution containing 0.15 mol of glucose dissolved in 410 g
acetic acid? The molar mass of glucose is 180 g/mol.
3. Calculate the mass of water that must be added to 0.45 mol of glucose to make a solution of 15.0 percent
by mass. The molar mass of glucose is 180 g/mol.
4. Concentrated sodium hydroxide is used as a laboratory reagent. The percent by mass of sodium hydroxide
is 61.0%. Calculate the mass of water that contains 95.0 g of sodium hydroxide.
5. Calculate the molarity of a solution containing 0.2 mol of sodium hydroxide dissolved in 0.5 L of water.
6. Calculate the percent by mass of 2.00 mol NaCl dissolved in 225 g of water. The molar mass of NaCl is
58.5 g/mol.
7. What is the percent by volume of 15.0 mL of ethanol in 0.250 L of water?
8. What is the molarity of a methanol solution that contains 25 g of methanol in 3.5 L of a solution? The
molar mass of methanol is 32 g/mol.
9. A 41.0-mL barium hydroxide solution of molarity 3.41 M is diluted with water to form 279 mL of the
solution. Calculate the molarity of the solution.
10. Calculate the moles of camphor dissolved in 1.32 L of phenol. The molar mass of camphor is 152 g/mol
and the molarity of phenol is 6.01 M.
11. Calculate the molality of formic acid in a solution containing 44 g of formic acid in 470 g of nitrobenzene.
The molar mass of formic acid is 36 g/mol.
12. Calculate the molality of glucose in a solution that which contains 35 g of glucose in 0.16 kg of phenol.
The molar mass of glucose is 180 g/mol.
13. Calculate the mass of nitric acid dissolved in 0.48 kg of water. The molality of the solution is 1.2 m and the
molar mass of nitric acid is 63 g/mol.
14. Calculate the mole fraction of sodium chloride in a solution containing 129 g of sodium chloride per 2.50
mol camphor. The molar mass of sodium chloride is 58.5 g/mol.
soltutions
Answer Section
PROBLEM
1. ANS:
270 g
2. ANS:
6.2%
3. ANS:
460 g
4. ANS:
60.7 g
5. ANS:
0.4 M
STA: 6d
6. ANS:
34.2%
7. ANS:
5.66%
8. ANS:
0.22 M
STA: 6d
9. ANS:
0.501 M
STA: 6d
10. ANS:
0.0522 mol
STA: 6d
11. ANS:
2.6 m
STA: 6d
12. ANS:
1.2 m
STA: 6d
13. ANS:
36 g
STA: 6d
14. ANS:
0.469
STA: 6d
solutions
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
ANS: B
ANS: A
ANS: C
ANS: B
ANS: A
ANS: C
ANS: D
ANS: D
ANS: B
ANS: D
ANS: A
ANS: B
ANS: D
ANS: C
ANS: B
ANS: B
ANS: A
ANS: B
ANS: C
ANS: D
ANS: C
ANS: B
ANS: A
ANS: C
ANS: B
ANS: C
ANS: B
ANS: D
ANS: B
Solution:
30. ANS: C
Solution:
31. ANS: A
Solution:
32. ANS: D
Solution:
33. ANS: A
Solution:
PROBLEM
34. ANS:
1.33 M NaNO3
Solution:
35. ANS:
0.104 M sucrose
Solution:
36. ANS:
3.60 g NaOH
Solution: