Q. What is the conjugate base of sulfuric acid (H2SO4)?
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A.
HSO4-
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B.
SO4^2-
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C.
H3O+
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D.
None of the above
Solution
The conjugate base of sulfuric acid (H2SO4) is HSO4-.
Correct Answer: B — SO4^2-
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Q. What is the effect of adding a base to a solution of hydrochloric acid?
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A.
Increase in pH
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B.
Decrease in pH
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C.
No effect
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D.
Formation of salt only
Solution
Adding a base to hydrochloric acid will neutralize it, resulting in an increase in pH.
Correct Answer: A — Increase in pH
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Q. What is the effect of adding a base to an acidic solution?
-
A.
Increase in pH
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B.
Decrease in pH
-
C.
No effect
-
D.
Formation of salt only
Solution
Adding a base to an acidic solution increases the pH, making it less acidic.
Correct Answer: A — Increase in pH
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Q. What is the primary product when sodium bicarbonate reacts with hydrochloric acid?
-
A.
Sodium chloride
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B.
Carbon dioxide
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C.
Water
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D.
All of the above
Solution
The reaction produces sodium chloride, carbon dioxide, and water.
Correct Answer: D — All of the above
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Q. What is the result of mixing equal volumes of 0.1 M HCl and 0.1 M NaOH?
-
A.
pH < 7
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B.
pH = 7
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C.
pH > 7
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D.
Cannot be determined
Solution
Mixing equal volumes of 0.1 M HCl and 0.1 M NaOH results in a neutral solution with pH = 7.
Correct Answer: B — pH = 7
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Q. Which of the following compounds is a weak acid?
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A.
Hydrochloric acid
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B.
Nitric acid
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C.
Acetic acid
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D.
Sulfuric acid
Solution
Acetic acid (CH3COOH) is a weak acid that does not completely dissociate in solution.
Correct Answer: C — Acetic acid
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Q. Which of the following indicators is used to determine the endpoint of a strong acid-strong base titration?
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A.
Methyl orange
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B.
Phenolphthalein
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C.
Bromothymol blue
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D.
Litmus
Solution
Phenolphthalein is commonly used for strong acid-strong base titrations as it changes color at pH 8.2-10.
Correct Answer: B — Phenolphthalein
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Q. Which of the following indicators would be suitable for a titration between a strong acid and a strong base?
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A.
Methyl orange
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B.
Phenolphthalein
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C.
Litmus
-
D.
Bromothymol blue
Solution
Phenolphthalein is suitable as it changes color around pH 7-10, which is ideal for strong acid-strong base titrations.
Correct Answer: B — Phenolphthalein
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