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preface to fifteenth edition

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ELECTROLYTES, EMF, AND CHEMICAL EQUILIBRIUM 8.51<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 />

-Hydroxyasparagine 2.28(1) 7.20(0)<br />

-Hydroxyasparagine 2.09(1) 8.29(0)<br />

Hydroxyaspartic acid 1.91(1) 3.51(0) 9.11(1)<br />

2-Hydroxybenzaldehyde (salicylaldehyde)<br />

8.34<br />

3-Hydroxybenzaldehyde 9.00<br />

4-Hydroxybenzaldehyde 7.620<br />

2-Hydroxybenzaldehyde oxime 1.37(1) 9.18 12.11<br />

2-Hydroxybenzamide 8.36<br />

2-Hydroxybenzenemethanol (2-hydroxybenzyl<br />

9.92<br />

alcohol)<br />

3-Hydroxybenzenemethanol 9.83<br />

4-Hydroxybenzenemethanol 9.82<br />

4-Hydroxybenzenesulfonic acid — 9.055(1)<br />

2-Hydroxybenzohydroxamic acid 5.19<br />

2-Hydroxybenzoic acid (salicyclic 2.98 12.38<br />

acid)<br />

3-Hydroxybenzoic acid 4.076 9.85<br />

4-Hydroxybenzoic acid 4.582 9.23<br />

4-Hydroxybenzonitrile 7.95<br />

2-Hydroxy-5-bromobenzoic acid 2.61<br />

2-Hydroxybutanoic acid (30C) 3.65<br />

L-3-Hydroxybutanoic acid (30C) 4.41<br />

4-Hydroxybutanoic acid (30C) 4.71<br />

2-Hydroxy-5-chlorobenzoic acid 2.63<br />

trans-2-Hydroxycinnamic acid 4.614<br />

trans-3-Hydroxycinnamic acid 4.40<br />

10-Hydroxycodeine 7.12<br />

cis-2-Hydroxycyclohexane-1-carboxylic<br />

4.796<br />

acid<br />

trans-2-Hydroxycyclohexane-1- 4.682<br />

carboxylic acid<br />

cis-3-Hydroxycyclohexane-1-carboxylic<br />

4.602<br />

acid<br />

trans-3-Hydroxycyclohexane-1- 4.815<br />

carboxylic acid<br />

cis-4-Hydroxycyclohexane-1-carboxylic<br />

4.836<br />

acid<br />

trans-4-Hydroxycyclohexane-1- 4.687<br />

carboxylic acid<br />

1-Hydroxy-2,4-dihydroxymethylbenzene<br />

9.79<br />

N-(Hydroxyethyl)biguanide 2.8(2) 11.53(1)<br />

N-(2-Hydroxyethyl)ethylenediamine<br />

7.21(2) 10.12(1)<br />

N-(2-Hydroxyethyl)ethylenediamine-N,N,N-triacetic<br />

2.39 5.37 9.93<br />

acid<br />

N-(2-Hydroxyethyl)iminodiacetic 2.2 8.65<br />

acid ( 0.1)<br />

N-(2-Hydroxyethyl)piperazine-Nethansulfonic<br />

7.55<br />

acid (20C)<br />

4-(2-Hydroxyethyl)-1-piperazinepropanesulfonic<br />

acid (20C)<br />

8.00

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