Modified True/False
Indicate
whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
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1.
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According to Arrhenius, acids produce hydrogen ions when dissolved in water.
____________________
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2.
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A
weak acid is a dilute solution. ____________________
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3.
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The
concentration of an acid or a base is usually expressed as mol/L.
____________________
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4.
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The
pH scale measures only the acidity of a solution. ____________________
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5.
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A
titration is a lab procedure that involves the dilution of an acidic or basic solution.
____________________________________________________________
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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6.
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A
solution with a precise concentration is called a a. | standard solution | c. | chemical solution | b. | dilute
solution | d. | concentrated
solution | | | | |
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7.
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Which
piece of laboratory equipment is used to transfer a small, accurately known volume of liquid from a
commercial solution? a. | graduated cylinder | c. | burette | b. | pipette | d. | beaker | | | | |
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8.
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To
safely dilute concentrated acids, you should always add a. | a small volume
of acid to a large volume of water | b. | a tiny volume of water to the acid | c. | a large volume
of acid to a small volume of water | d. | a 5050 mixture of acid and
water | | |
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9.
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Why
is nitric acid classified as a strong acid? a. | It has a high electrical
conductivity. | b. | It ionizes about 50%. | c. | It ionizes more
than 99%. | d. | It has a high electrical conductivity, and it ionizes more than
99%. | | |
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10.
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For a
neutral solution, which of the following statements is true? a. | The
concentration of hydrogen ions, [H+], equals 1 ´ 107 mol/L. | b. | The pH of a
neutral solution is 7. 0. | c. | The concentration of hydrogen ions, [H+], equals the
concentration of hydroxide ions, [OH]. | d. | all of the
above | | |
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11.
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An
acid has a pH of 4. If water is added to the acid to dilute it, what will occur? a. | The pH will
decrease. | c. | The pH will not
change. | b. | The pH will increase. | d. | none of the above | | | | |
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12.
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An
acid solution, such as vinegar, a. | turns red litmus paper blue | c. | has a bitter taste | b. | turns blue
litmus paper red | d. | feels
slippery | | | | |
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13.
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How
much more acidic is vinegar (pH = 2) than coffee (pH = 5)?
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14.
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Which
of the following is an application of a titration? a. | determining the
concentration of acetic acid in vinegar | b. | determining the concentration of acid in a commercial rust
remover | c. | performing a laboratory acidbase
neutralization | d. | all of the above | | |
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Completion
Complete each sentence or
statement.
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15.
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When
an acidic solution is diluted, the pH ____________________. When a basic solution is diluted, the pH
____________________.
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16.
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Hydrochloric acid is added to several small pieces of zinc in a test tube. When a
lighted splint is brought to the mouth of the test tube, it ____________________. The gas produced is
____________________.
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17.
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Hydrochloric acid is added to sodium hydrogen carbonate (baking soda) in a test tube.
When drops of limewater are placed near the top of the test tube, they turn ____________________. The
gas produced is ____________________.
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18.
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An
oxide that is soluble in water and causes blue litmus to turn red is ____________________. An oxide
that is soluble in water and causes red litmus to turn blue is ____________________.
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19.
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The
____________________ ion is responsible for the properties of an acid. The ____________________ ion
is responsible for the properties of a base.
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20.
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An
acid and a base react with one another in a(n) ____________________ reaction to produce a(n)
____________________ and ____________________.
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