Calculate the pH, pOH, and the fraction of protonated acid for the 0.1 M solution of lactic acid (see Table 4.4 for pK, values, also attached below).
Calculate the pH, pOH, and the fraction of protonated acid for the 0.1 M solution of lactic acid (see Table 4.4 for pK, values, also attached below).
Chapter17: Spontaneity, Entropy, And Free Energy
Section: Chapter Questions
Problem 100CWP
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Transcribed Image Text:Calculate the pH, pOH, and the fraction of protonated acid for the 0.1 M
solution of lactic acid (see Table 4.4 for pk3 values, also attached below).
Transcribed Image Text:Table 4.4 Acidity and basicity constants* at 298.15 K
Acid/base
pK,
K,
pK,
Strongest weak acids
Trichloroacetic acid, CCl;COOH
3.3 x 10 14
13.48
3.0 x 10
0.52
2× 101
1.7x 10
Benzenesulfonic acid, C,H;SO;H
5.0x 10 14
13.30
0.70
Iodic acid, HIO,
5.9x 10 4
13.23
0.77
Sulfurous acid, H,SO;
6.3 x 10 13
12.19
1.6 x 102
1.81
Chlorous acid, HCIO,
1.0x 10 12
12.00
1.0x 10 2
2.00
1.3x 10 12
7.1 x 10-12
Phosphoric acid, H,PO,
11.88
7.6 x 10 3
2.12
Chloroacetic acid, CH,CICOOH
11.15
1.4x 10 3
2.85
Lactic acid, CH,CH(OH)COOH
1.2x 10-"
10.92
8.4 x 10
3.08
Nitrous acid, HNO,
2.3 x 10 1"
10.63
4.3 × 101
3.37
Hydrofluoric acid, HF
2.9 x 10 "
10.55
3.5 x 101
3.45
Formic acid, HCOOH
5.6x 10 1
10.25
1.8 x 104
3.75
Benzoic acid, CH;COOH
1.5x 10 10
9.81
6.5 x 101
4.19
Acetic acid, CH;COOH
5.6x 10 10
9.25
1.8 x 101
4.75
Carbonic acid, H,CO,
2.3 x 108
3.3 x 107
7.63
4.3 x 107
6.37
Hypochlorous acid, HCIO
6.47
3.0x 10 *
7.53
Hypobromous acid, HBRO
5.0x 10 6
5.31
2.0 x 109
8.69
Boric acid, B(OH),H
1.4x 10 5
4.86
7.2x 10 10
9.14
Hydrocyanic acid, HCN
2.0 x 105
4.69
4.9 x 10 10
9.31
Phenol, CH;OH
7.7x 105
4.11
1.3 x 10 10
9.89
Hypoiodous acid, HIO
4.3 x 10
-4
3.36
2.3 x 10 "
10.64
Weakest weak bases
Urea, CO(NH,),
1.3 x 10 14
13.90
7.7x 10
0.10
Aniline, CH;NH,
4.3 x 10 10
9.37
2.3 × 10-5
4.63
Pyridine, C,H;N
1.8 x 10
8.75
5.6 x 106
5.35
Hydroxylamine, NH,OH
1.1 x 10 *
7.97
9.1 x 107
6.03
Nicotine, CjoH1,N2
1.0x 106
5.98
1.0 x 10 8
8.02
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