Acids, Bases and Salts - Higher Difficulty Problems
Q. What is the net ionic equation for the reaction between H2SO4 and NaOH?
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A.
H+ + OH- -> H2O
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B.
Na+ + SO4^2- -> Na2SO4
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C.
H2SO4 + NaOH -> Na2SO4 + H2O
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D.
H2O -> H+ + OH-
Solution
The net ionic equation shows the formation of water from hydrogen ions and hydroxide ions.
Correct Answer: A — H+ + OH- -> H2O
Q. Which of the following acids is a strong acid in aqueous solution?
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A.
HCl
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B.
HF
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C.
H2CO3
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D.
CH3COOH
Solution
HCl is a strong acid that completely dissociates in water, while HF, H2CO3, and CH3COOH are weak acids.
Correct Answer: A — HCl
Q. Which of the following compounds acts as a Brønsted-Lowry base?
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A.
HCl
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B.
NH3
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C.
H2O
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D.
CH3COOH
Solution
NH3 acts as a Brønsted-Lowry base because it can accept a proton.
Correct Answer: B — NH3
Q. Which of the following is a characteristic of a weak acid?
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A.
Completely dissociates in solution
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B.
Has a high pKa value
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C.
Produces a strong electrolyte
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D.
Has a low pH
Solution
Weak acids have a high pKa value, indicating they do not completely dissociate in solution.
Correct Answer: B — Has a high pKa value
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