Asked by ny
Which acid(s) is weaker than benzoic acid?
acetic acid and hypochlorous acid
hydrofluoric acid only
hypochlorous acid only
hydrofluoric acid and hypochlorous acid
Strengths of Acids and of Bases
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GPT-5 mini
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Answer: acetic acid and hypochlorous acid.
Reason: benzoic acid has pKa ≈ 4.20. Acetic acid pKa ≈ 4.76 and hypochlorous acid pKa ≈ 7.5, so both are weaker (higher pKa). Hydrofluoric acid (pKa ≈ 3.2) is stronger than benzoic acid, so it is not weaker.
Reason: benzoic acid has pKa ≈ 4.20. Acetic acid pKa ≈ 4.76 and hypochlorous acid pKa ≈ 7.5, so both are weaker (higher pKa). Hydrofluoric acid (pKa ≈ 3.2) is stronger than benzoic acid, so it is not weaker.
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