Matching
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Match each item with the correct statement below. a. | salt hydrolysis | d. | equivalence point | b. | end point | e. | buffer capacity | c. | titration |
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1.
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process of adding a known amount of solution of known concentration to
determine the concentration of another solution
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2.
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The number of moles of hydrogen ions equals the number of moles of hydroxide
ions.
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3.
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Indicator changes color.
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4.
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Cations or anions of a dissociated salt remove hydrogen ions from or donate
hydrogen ions to water.
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5.
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the amount of acid or base that can be added to a buffer solution before a
significant change in pH occurs
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Multiple Choice Identify the
choice that best completes the statement or answers the question.
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6.
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What is the formula for phosphoric acid?
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7.
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Which of the following is a property of an acid?
a. | sour taste | c. | strong color | b. | nonelectrolyte | d. | unreactive |
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8.
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What is a property of a base?
a. | unreactive | c. | bitter taste | b. | watery feel | d. | strong color |
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9.
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Which hydroxide compound yields the lowest concentration of hydroxide ions in
aqueous solution?
a. | potassium hydroxide | c. | sodium hydroxide | b. | calcium hydroxide | d. | magnesium
hydroxide |
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10.
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What is an acid according to Arrhenius?
a. | a substance that is a hydrogen ion donor | b. | a substance that
ionizes to yield protons in aqueous solution | c. | a substance that is a hydrogen ion
acceptor | d. | a substance that accepts an electron pair |
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11.
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What is transferred between a conjugate acid-base pair?
a. | a hydronium ion | c. | a proton | b. | a hydroxide ion | d. | an electron |
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12.
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In the reaction CO + H O HCO + OH , the
carbonate ion is acting as a(n) ____.
a. | Arrhenius base | c. | Arrhenius acid | b. | Brønsted-Lowry base | d. | Brønsted-Lowry
acid |
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13.
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What is the charge on the hydronium ion?
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14.
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In a neutral solution, the [H ] is ____.
a. | zero | c. | 1 10M | b. | equal to
[OH] | d. | 10M |
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15.
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What is pH?
a. | the negative logarithm of the hydroxide ion concentration | b. | the positive
logarithm of the hydrogen ion concentration | c. | the positive logarithm of the hydroxide ion
concentration | d. | the negative logarithm of the hydrogen ion
concentration |
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16.
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Which of these solutions is the most basic?
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17.
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An indicator is what type of compound?
a. | oxidizing agent | c. | salt | b. | strong base or acid | d. | weak base or
acid |
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18.
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What characterizes a strong acid or base?
a. | complete ionization in water | b. | ionic bonding | c. | presence of a
hydroxide or hydrogen ion | d. | polar covalent
bonding |
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19.
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What is another name for the acid dissociation constant?
a. | ionization constant | c. | mole fraction | b. | equilibrium constant | d. | rate constant |
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20.
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A 0.12M solution of an acid that ionizes only slightly in solution would
be termed ____.
a. | strong and dilute | c. | dilute and weak | b. | concentrated and weak | d. | concentrated and
strong |
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21.
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Which of the following pairs consists of a weak acid and a strong base?
a. | nitric acid, calcium hydroxide | c. | acetic acid, sodium
hydroxide | b. | acetic acid, ammonia | d. | sulfuric acid, sodium hydroxide |
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22.
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A substance with a K of 1 10 would be
classified as a ____.
a. | strong base | c. | weak base | b. | weak acid | d. | strong acid |
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23.
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If an acid has a K = 1.6 10 , what is the
acidity of the solution?
a. | acidic | c. | neutral | b. | The answer cannot be
determined. | d. | basic |
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24.
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Which base has the smallest base dissociation constant?
a. | ammonia | c. | calcium hydroxide | b. | sodium hydroxide | d. | potassium
hydroxide |
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25.
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In a titration, when the number of moles of hydrogen ions equals the number of
moles of hydroxide ions, what is said to have happened?
a. | The equivalence point has been reached. | b. | The titration has
failed. | c. | The point of neutralization has been reached. | d. | The end point has
been reached. |
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Short Answer
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26.
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A liter of impure water has 10 mol of hydroxide ions. What is the
concentration of hydronium ions in this sample of water?
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27.
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What is the hydrogen-ion concentration if the acid dissociation constant is
0.000 001 and the acid concentration is 0.01M?
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28.
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A 0.500 M solution of a weak acid, H X, is only partially ionized.
The [H ] was found to be 4.02 10 M. Find the
dissociation constant for this acid.
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29.
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What is the pH if the hydrogen-ion concentration is 6.8 10 M?
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30.
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Calculate the acid dissociation constant of a weak monoprotic acid if a
0.5M solution of this acid gives a hydrogen-ion concentration of 0.000 1M?
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Numeric Response
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31.
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If the hydrogen ion concentration is 10 M, what is the pH of
the solution?
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32.
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If the hydroxide ion concentration is 10 M, what is the pH of
the solution?
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33.
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If [OH ] = 1 10 M, what is the pH of
the solution?
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34.
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What is the pH of a solution with a concentration of 0.01M hydrochloric
acid?
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35.
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What is the pH when the hydrogen ion concentration is 7.0 10 M?
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