Ochem 1 - pKa Values of Acids/Bases

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34 Terms

1

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<p>pKa of <strong>HCl</strong> </p><p>(Hydrochloric Acid)</p>

pKa of HCl

(Hydrochloric Acid)

-7

2

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What is the Conjugate base of:

H—Cl

(Hydrochloric Acid)

Cl^-

(Chloride)

<p><strong>Cl<sup>- </sup> </strong></p><p>(Chloride)</p>

3

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Acid or Base?

HCl

Strong Acid

4

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<p>pKa of <strong>H₃O⁺</strong></p><p>(Hydronium)</p>

pKa of H₃O⁺

(Hydronium)

-1.7

5

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Acid or Base?

H₃O⁺

Strong Acid

6

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What is the Conjugate Base of:

H₃O⁺

(Hydronium)

H₂O (water)

<p><strong>H₂O</strong> (water)</p>

7

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<p>pKa of <strong>CH₃COOH</strong></p><p>(Acetic Acid)</p>

pKa of CH₃COOH

(Acetic Acid)

4.8

8

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Acid or Base?

CH₃COOH

Acetic acid

Strong Acid

9

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What is the Conjugate base of:

CH₃COOH

Acetic acid

CH₃COO^- (acetate)

<p><strong>CH₃COO<sup>-</sup> </strong>(acetate)</p>

10

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<p>pKa of <strong>NH₄⁺</strong></p><p>(Ammonium)</p>

pKa of NH₄⁺

(Ammonium)

9.25

11

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Acid or Base?

Ammonium (NH₄⁺)

Strong Acid

12

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What is the Conjugate base of:

Ammonium (NH₄⁺)

NH₃ (ammonia)

<p><strong>NH₃ </strong>(ammonia)</p>

13

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<p>pKa of <strong>CH₃CH₂OH</strong></p><p>(Ethanol)</p>

pKa of CH₃CH₂OH

(Ethanol)

16

14

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Acid or Base?

CH₃CH₂OH

(ethanol)

Neutral (Able to donate protons)

15

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What is the Conjugate Base of:

CH₃CH₂OH

(Ethanol)

CH₃CH₂O^- (ethoxide / alkoxide)

<p><strong>CH₃CH₂O<sup>-</sup> </strong>(ethoxide / alkoxide)</p>

16

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<p>pKa of <strong>HC≡CH, sp</strong></p><p>(Ethyne)</p>

pKa of HC≡CH, sp

(Ethyne)

25

17

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Acid or Base?

HC≡CH, sp

(Ethyne)

Weak Acid

18

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What is the Conjugate Base of:

HC≡CH, sp

(Ethyne)

HC≡C^- (acetylide anion)

<p><strong>HC≡C<sup>-</sup> </strong>(acetylide anion)</p>

19

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<p>pKa of <strong>H₂</strong></p><p><strong>Hydrogen</strong></p>

pKa of H₂

Hydrogen

35

20

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Acid or Base?

H₂

Hydrogen

Neutral

21

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What is the Conjugate base of:

H₂

Hydrogen

H^- (hydride)

<p><strong>H<sup>-</sup></strong> (hydride)</p>

22

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<p>pKa of <strong>NH₃</strong></p><p><strong>(Ammonia)</strong></p>

pKa of NH₃

(Ammonia)

38

23

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Acid or Base?

NH₃

(Ammonia)

Weak Base

24

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What is the Conjugate Base of:

NH₃

(Ammonia)

NH₂^- (amide)

<p><strong>NH₂<sup>-</sup> </strong>(amide)</p>

25

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<p>pKa of (<strong>CH₂=CH₂, sp²</strong>)</p><p><strong>(Ethene)</strong></p>

pKa of (CH₂=CH₂, sp²)

(Ethene)

44

26

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Acid or Base?

(CH₂=CH₂, sp²)

(Ethene)

Neutral

(weak acid/weak base)

27

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What is the Conjugate Base of:

(CH₂=CH₂, sp²)

(Ethene)

^-CH=CH₂ (ethenide)

<p><strong><sup>-</sup>CH=CH₂</strong> (ethenide)</p>

28

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<p>pKa of (<strong>CH₄, sp³</strong>)</p><p><strong>(Methane)</strong></p>

pKa of (CH₄, sp³)

(Methane)

50

29

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Acid or Base?

(CH₄, sp³)

(Methane)

Neutral

(weak acid/weak base)

30

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What is the Conjugate Base of:

(CH₄, sp³)

(Methane)

^-CH₃ (carbanion)

<p><strong><sup>-</sup>CH₃</strong> (carbanion)</p>

31

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<p>pKa of <strong>H<sub>2</sub>O</strong></p><p><strong>(Water)</strong></p>

pKa of H₂O

(Water)

15.7

32

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<p>pKa of <strong>H<sub>2</sub>SO<sub>4</sub></strong></p><p><strong>(Sulfuric Acid)</strong></p>

pKa of H₂SO₄

(Sulfuric Acid)

-3

33

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Acid or Base?

H₂SO₄

(Sulfuric Acid)

Strong Acid

34

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What is the Conjugate Base of:

H₂SO₄

(Sulfuric Acid)

HSO₄^- (Hydrogen Sulfate Ion)