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preface to fifteenth edition

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ELECTROLYTES, EMF, AND CHEMICAL EQUILIBRIUM 8.31<br />

TABLE 8.8<br />

pK a Values of Organic Materials in Water at 25C (Continued)<br />

Substance pK 1 pK 2 pK 3 pK 4<br />

Benzene-1-carboxylic acid-4-phosphoric<br />

1.50 3.95 6.89<br />

acid<br />

Benzenediazine<br />

11.08(1)<br />

1,3-Benzenedicarboxylic acid (isophthalic<br />

3.62(0) 4.60(1)<br />

acid)<br />

1,4-Benzenedicarboxylic acid (terephthalic<br />

3.54(0) 4.46(1)<br />

acid)<br />

1,3-Benzenedicarboxylic acid mononitrile<br />

3.60(0)<br />

1,4-Benzenedicarboxylic acid mononitrile<br />

3.55(0)<br />

Benzenehexacarboxylic acid (pK 5 0.68 2.21 3.52 5.09<br />

6.32; pK 6 7.49)<br />

Benzenepentacarboxylic acid (pK 5 1.80 2.73 3.96 5.25<br />

6.46)<br />

Benzenesulfinic acid 1.50<br />

Benzenesulfonic acid 2.554<br />

1,2,3,4-Benzenetetracarboxylic acid 2.05 3.25 4.73 6.21<br />

1,2,3,5-Benzenetetracarboxylic acid 2.38 3.51 4.44 5.81<br />

1,2,4,5-Benzenetetracarboxylic acid 1.92 2.87 4.49 5.63<br />

1,2,3-Benzenetricarboxylic acid 2.88 4.75 7.13<br />

1,2,4-Benzenetricarboxylic acid 2.52 3.84 5.20<br />

1,3,5-Benzenetricarboxylic acid 2.12 4.10 5.18<br />

Benzil--dioxime 12.0<br />

Benzilic acid 3.09<br />

Benzimidazole 5.53(1) 12.3(0)<br />

Benzohydroxamic acid (20C) 8.89(0)<br />

Benzoic acid 4.204<br />

5,6-Benzoquinoline (20C)<br />

5.00(1)<br />

7,8-Benzoquinoline (20C)<br />

4.15(1)<br />

1,4-Benzoquinone monoxime 6.20<br />

Benzosulfonic acid 0.70<br />

1,2,3-Benzotriazole<br />

8.38(1)<br />

1-Benzoylace<strong>to</strong>ne 8.23<br />

Benzoylamine<br />

9.34(1)<br />

2-Benzoylbenzoic acid 3.54<br />

Benzoylglutamic acid 3.49 4.99<br />

N-Benzoyglycine (hippuric acid) 3.65<br />

Benzoylhydrazine 3.03(2) 12.45(1)<br />

Benzoylpyruvic acid 6.40 12.10<br />

3-Benzoyl-1,1,1-trifluoroace<strong>to</strong>ne 6.35<br />

Benzylamine<br />

9.35(1)<br />

Benzylamine-4-carboxylic acid 3.59 9.64<br />

2-Benzyl-2-phenylsuccinic acid 3.69 6.47<br />

(20C)<br />

2-Benzylpyridine<br />

5.13(1)<br />

4-Benzylpyridine-1-oxide<br />

1.018(1)<br />

1-Benzylpyrrolidine<br />

9.51(1)<br />

2-Benzylpyrrolidine<br />

10.31(1)<br />

Benzylsuccinic acid (20C) 4.11 5.65<br />

3-(Benzylthio)propanoic acid 4.463<br />

Berberine (18C)<br />

11.73(1)<br />

Betaine<br />

1.832(1)

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