Modified True/False Indicate
whether the statement is true or false. If false, change the identified word or phrase to make
the statement true.
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1.
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The component of a solution that is present in the greatest amount is called the
solute. _________________________
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2.
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A molecule, like water, that has a charge separation is called a polar
molecule. _________________________
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Multiple Choice Identify the
choice that best completes the statement or answers the question.
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3.
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A mixture of two or more substances that is uniform at the molecular level is
considered a(n):
a. | atom. | b. | compound. | c. | molecule. | d. | solution. |
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4.
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Solubility is most often given as the number of grams of solute that will
dissolve in:
a. | 100 grams of solvent. | b. | 1000 grams of solvent. | c. | 1 milliliters of
solvent. | d. | 100 milliliter of solvent. |
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5.
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The ratio of the amount of solvent to the amount of solution is the ____ of the
solution.
a. | solubility | b. | saturation | c. | concentration | d. | solute |
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6.
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A liquid known as the universal solvent is:
a. | sulfuric acid. | b. | water. | c. | sodium
hydroxide. | d. | aqua regia. |
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7.
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An example of a mixture that is NOT a solution is:
a. | salt and pepper in the same shaker. | b. | iron and carbon mixed to make
steel. | c. | sugar, water, and flavoring in a drink. | d. | gold and silver as
an 18-karat gold ring. |
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8.
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Each of the following is an example of a solution EXCEPT:
a. | grape soda. | b. | steel. | c. | 14 karat
gold. | d. | mercury. |
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9.
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Orange soda is a solution. The solvent in a glass of orange soda would be
the:
a. | flavoring. | b. | water. | c. | color. | d. | carbon dioxide
gas. |
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10.
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If large amounts of hot water are released from a power plant into a
lake:
a. | the amount of dissolved oxygen in that part of the lake
increases. | b. | the amount of dissolved oxygen in that part of the lake
decreases. | c. | the fish in the lake would be unaffected as long as the water is
clean. | d. | the warm water would decrease the need for oxygen in
fish. |
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11.
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All carbonated beverages are solutions. All of the following are solutes
in the beverage EXCEPT:
a. | flavoring. | b. | coloring. | c. | water. | d. | sugar. |
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12.
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Solutes would tend to dissolve quickly for all of the following reasons
EXCEPT:
a. | The temperature of the solvent is decreased. | b. | The size of the
solute particles is decreased. | c. | The solute and solvent are shaken
vigorously. | d. | The solute is extremely soluble in the solvent. |
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13.
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If 40 grams of solvent is dissolved to make 100 grams of solution, what
is the concentration of the solution?
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14.
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The amount of solute necessary to make 400 grams of a 12% solution is:
a. | 48 grams | b. | 352 grams | c. | 388
grams | d. | 412 grams |
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15.
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When a solution reaches equilibrium:
a. | it contains less solute than it will dissolve at a given
temperature. | b. | it contains more solute than it will normally dissolve at a given
temperature. | c. | solute is going into solution faster than it is coming out of
solution. | d. | solute is going into solution as fast as it is coming out of
solution. |
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16.
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To cause the greatest increase in the solubility of a gas in a liquid a
scientist would:
a. | increase the temperature of the solution and decrease the pressure on the
solution. | b. | decrease the temperature of the solution and increase the pressure on the
solution. | c. | increase both the temperature of the solution and the pressure on the
solution. | d. | decrease both the temperature of the solution and the pressure on the
solution. |
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17.
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The solubility of sugar at 25ºC is 200 g per 100 mL of water. The amount
of sugar that would dissolve in 5.0 mL of water at 25ºC is:
a. | 1.0 grams | b. | 2.5 grams | c. | 10
grams | d. | 100 grams |
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18.
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If 60 grams of solute is dissolved in 140 grams of solvent, the
concentration of the solution is:
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Completion Complete each
statement.
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Select the correct term to complete each sentence. There are extra terms in
the list.supersaturated | saturated | insoluble | soluble | solubility | dissolved | | | |
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19.
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When solute particles are evenly distributed throughout the solvent, the solute
is described as being ____________________.
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20.
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The amount of solute that will dissolve in a certain volume of solvent is known
as ____________________.
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21.
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If a solute will not dissolve in a particular solvent, for that solvent the
solute is considered ____________________.
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22.
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At 25ºC, 40 grams of table salt is added to 100 mL of water in a test tube.
After the solution has been shaken, some of the salt remains on the bottom of the test tube and will
not dissolve because the solution is ____________________.
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23.
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When a solvent contains more dissolved solute than it will hold under normal
conditions, the solution is considered to be _________________________.
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Short Answer
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24.
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State two ways to increase the solubility of a gas in a liquid.
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25.
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Why is water a good solvent?
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26.
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Iron and carbon are mixed together to form the alloy known as steel. In this
solution, which material is the solvent?
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27.
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List two ways to increase the rate at which a solid solute will dissolve
in a solvent.
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28.
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Why is water called the universal solvent?
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29.
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Define equilibrium in the solution process. At what point in the
solution process does equilibrium occur?
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Problem
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30.
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The solubility of table salt at 25ºC is 37.7 grams per 100 mL of water. How
much table salt can be dissolved in 250 mL of water at 25ºC?
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31.
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How many grams of sugar would you need to add to water to make 250 grams of a 9%
solution?
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32.
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At 25ºC, 47.0 grams of solute A is dissolved in 79.0 mL of water. What is
the solubility of substance A in water at this temperature?
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33.
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How much water at 25ºC would be needed to dissolve 50 grams of
baking soda? The solubility of baking soda in water at 25ºC is approximately 10 grams per 100
mL.
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Essay
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34.
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Why does grinding a solute into small particles increase the rate at which the
solute dissolves?
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35.
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Explain how large crystals of sugar might be formed in a container.
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36.
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On warm summer days fish can be seen coming to the surface of shallow ponds to
“gulp” air while other fish, on the same days, go to the bottom of deep lakes. Explain
the behavior of the fish based upon gas solubility.
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