Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Acids
taste a. | sweet. | c. | bitter. | b. | sour. | d. | salty. | | | | |
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2.
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What
is an Arrhenius acid? a. | a chemical compound that increases the concentration of
hydrogen ions in aqueous solution | b. | a chemical compound that increases the concentration of
hydroxide ions in aqueous solution | c. | a chemical compound that decreases the concentration of
hydrogen ions in aqueous solution | d. | a chemical compound that decreases the concentration of
hydroxide ions in aqueous solution | | |
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3.
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Which
of the following is a strong base? a. | NH3 | c. | NaOH | b. | aniline | d. | acetate ion | | | | |
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4.
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Which
of the following is a weak base? a. | acetate ion | c. | hydronium ion | b. | hydroxide
ion | d. | hydrogen
ion | | | | |
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5.
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A
Brønsted-Lowry acid is a. | an electron-pair acceptor. | c. | a proton acceptor. | b. | an electron-pair
donor. | d. | a proton
donor. | | | | |
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6.
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An
electron-pair donor is a a. | traditional base. | c. | Brønsted-Lowry base. | b. | Brønsted-Lowry acid. | d. | Lewis base. | | | | |
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7.
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A
conjugate base is the species that a. | remains after a base has given up a
proton. | b. | is formed by the addition of a proton to a
base. | c. | is formed by the addition of a proton to an
acid. | d. | remains after an acid has given up a
proton. | | |
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8.
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In a
conjugate acid-base pair, the acid typically has a. | one more proton than the base. | c. | two fewer protons than the base. | b. | one fewer proton
than the base. | d. | the same number
of protons as the base. | | | | |
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9.
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In
the reaction CH3COOH + H2O 
H3O+ + CH3COO–, the conjugate base of
H3O+ is a. | H2O. | c. | CH3COO–. | b. | CH3COOH. | d. | not shown. | | | | |
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10.
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What
is the pH of a 0.001 62 M NaOH solution? a. | 3.841 | c. | 9.923 | b. | 5.332 | d. | 11.210 | | | | |
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11.
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What
is the hydronium ion concentration of a solution whose pH is 4.12? a. | 4.4 ´
10–8 M | c. | 6.4 ´
10–5 M | b. | 5.1 ´ 10–6 M | d. | 7.6 ´ 10–5 M | | | | |
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12.
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What
is the molarity of an H3PO4 solution if 358 mL is completely titrated by 876 mL
of 0.0102 M Ba(OH)2 solution? a. | 0.0111 M | c. | 0.0250 M | b. | 0.0166
M | d. | 0.0333
M | | | | |
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13.
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Acidic solutions are generally formed by hydrolysis of cations of salts
of a. | weak acids and
weak bases. | c. | strong acids and
weak bases. | b. | weak acids and strong bases. | d. | strong acids and strong bases. | | | | |
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14.
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Which
one of the following compounds is incorrectly identified as to type of
compound?
a. | Substance Type of
Compound
KOH strong
base
| c. | Substance Type of
Compound
HClO4
strong
acid
| b. | Substance Type of
Compound
HNO2
weak acid
| d. | Substance Type of
Compound
NH3
strong base | | | | |
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15.
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The
pH of a 0.10 M solution of a monoprotic acid is 2.85. What is the value of the ionization
constant of the acid?
a. | 6.3 X 10-5 | c. | 2.0 X 10-5
| b. | 7.2 X
10-4
| d. | 4.0 X
10-6
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16.
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The
[H3O+] = 2.0 X 10-4 M for a 0.020 M solution of a weak
acid. Calculate the pKa for this acid.
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17.
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When
solid NaCN is added to water, the pH ____________.
a. | remains at
7
| c. | becomes less
than 7 because of hydrolysis of Na+
| b. | becomes greater
than 7 because of hydrolysis of Na+
| d. | becomes greater than 7 because of hydrolysis of
CN-
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18.
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Calculate the [H+] in a solution that is 0.10 M in NaF and 0.20 in HF. (Ka = 7.2
x 10–4)
a. | 0.20 M
| c. | 1.4 x 10–3 M
| b. | 7.0 x
10–4 M
| d. | 3.5 x
10–4 M | | | | |
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19.
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The
pain killer morphine is a weak base when added to water. The reaction produces one mole of
hydroxide ions for every one mole of morphine that dissolves. The Kb
is
1.60 x 10–6. What is the pH of a 5.00 x 10–3 M
solution of morphine?
a. | 8.23
| c. | 11.3
| b. | 9.95
| d. | 10.2
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20.
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Calculate the pH of a 0.10 M solution of Ba(OH)2.
a. | 13.30
| c. | 0.20
| b. | 0.10
| d. | 13.00
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Problem
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21.
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Find
[H3O+] for a soft drink whose pH is 3.20.
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22.
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Find
[H3O+] for a window-cleaning solution whose pH is 12.
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