Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following is a base?
a. | ammonia | b. | Aspirin | c. | carbonated
water | d. | battery fluid |
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2.
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What happens when an acid is added to the following buffer system? a. | The acid shifts the equilibrium to the left, removing only a few H+(aq)
ions, so the pH is decreased. | b. | The acid shifts the equilibrium to the right,
producing H+(aq) ions, so the pH is decreased. | c. | The acid shifts the
equilibrium to the right, producing a few H+(aq) ions and maintaining the
pH. | d. | The acid shifts the equilibrium to the left, removing H+(aq) ions and
maintaining the pH. |
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3.
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What type of ions do bases contain?
a. | bicarbonate | b. | anions | c. | cations | d. | hydroxide |
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4.
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What do BrÆnsted-Lowry bases do?
a. | They accept electrons. | b. | They accept protons. | c. | They donate
electrons. | d. | They donate protons. |
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5.
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Identify the conjugate base for HA in the following equation.
HA +
H2O ® A- +
H3O+
a. | H2O | b. | H3O+ | c. | A- | d. | None exists because hydroxide is not
present. |
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6.
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Phenolphthalein works in the range pH 8 to 12.5 and turns pink in that range.
What will occur if this indicator is placed in a 0.001mol/L KOH solution?
a. | The solution will remain clear. | b. | One drop will turn pink but the solution will
remain clear. | c. | The solution will turn pink. | d. | The solution will turn slightly
pink. |
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7.
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Solution A has a pH of 5 and solution B has a pH of 8. Which has the greater
concentration of OH– ions?
a. | Solution B | b. | Solution A | c. | It depends on the
percent ionization of A and B. | d. | It depends on the molarity of A and
B. |
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8.
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Which of these acids is the strongest?
a. | acetic acid | b. | hydrochloric acid | c. | hydrocyanic acid
| d. | ammonia |
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9.
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Which of the following bases would have the highest pH value?
a. | 0.1 mol/L NaOH | b. | 0.1 mol/L
Ca(OH)2 | c. | 55.5 mol/L H2O | d. | 1 ´ 10-3 mol/L
LiOH |
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10.
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Identify the conjugate base for HSO 4-
(aq) from the following equation:
HSO4-(aq) +
HPO42-(aq) «
H2PO4-(aq) + SO42-(aq)
a. | HPO42- (aq) | b. | H2SO4
(aq) | c. | SO42- (aq) | d. | HPO4-
(aq) |
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11.
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If pOH = 0.700 for a 0.100 mol/L solution of Ca(OH)2, what would its
pH be?
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12.
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If Ka = 5.8 ´ 10-10, then what is the value of Kb?
a. | 8.2 ´ 10-4 | b. | 6.3 ´
105 | c. | 9.2 | d. | 1.7 ´
10-5 |
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