pKa values
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Last updated 3:53 PM on 1/14/26
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17 Terms
1
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Hydroiodic acid (HI)
pKa ≈ −10 (very strong acid)
2
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Hydrobromic acid (HBr)
pKa ≈ −9 (very strong acid)
3
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Hydrochloric acid (HCl)
pKa ≈ −8 (very strong acid)
4
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Sulfuric acid (H₂SO₄)
pKa ≈ −3 (strong acid)
5
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Hydronium ion (H₃O⁺)
pKa ≈ −1.7
6
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Hydrofluoric acid (HF)
pKa ≈ 3.2 (weak acid despite HF bond)
7
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Carboxylic acids
pKa ≈ 4–5
8
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Protonated amines
pKa ≈ 9–11
9
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Water (H₂O)
pKa ≈ 15.7
10
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Alcohols
pKa ≈ 16–18
11
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Ketones
(α-hydrogens) pKa ≈ 20–24
12
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Amides
pKa ≈ 25
13
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Terminal alkynes
pKa ≈ 25
14
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Hydrogen (H₂)
pKa ≈ 35
15
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Amines
pKa ≈ 35
16
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Alkenes
pKa ≈ 44
17
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Alkanes
pKa ≈ 50
Note 
Flashcards (74)