scholarly journals pH values of certain phosphate-chloride mixtures, and the second dissociation constant of phosphoric acid from 0 degrees to 60 degrees C

1943 ◽  
Vol 30 (2) ◽  
pp. 129 ◽  
Author(s):  
R.G. Bates ◽  
S.F. Acree
Keyword(s):  
Phosphoric Acid ◽  
Dissociation Constant ◽  
Ph Values ◽  
Second Dissociation Constant

Intracellular pH Determination by a 31P-NMR Technique. The Second Dissociation Constant of Phosphoric Acid in a Biological System

1983 ◽  
Vol 94 (3) ◽  
pp. 729-734 ◽  
Author(s):  
Yoshiteru SEO ◽  
Masataka MURAKAMI ◽  
Hiroshi WATARI ◽  
Yusuke IMAI ◽  
Kazuo YOSHIZAKI ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Dissociation Constant ◽  
Intracellular Ph ◽  
Biological System ◽  
31P Nmr ◽  
Second Dissociation Constant

Intracellular pH determination by a 31P-NMR technique. The second dissociation constant of phosphoric acid in a biological system

1984 ◽  
Vol 2 (2) ◽  
pp. 147 ◽  
Author(s):  
Yoshiteru Seo ◽  
Masataka Murakami ◽  
Hiroshi Watari ◽  
Yusuke Imai ◽  
Kazuo Yoshizaki ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Dissociation Constant ◽  
Intracellular Ph ◽  
Biological System ◽  
31P Nmr ◽  
Second Dissociation Constant

scholarly journals pH-controlled hydrogen-bonding (Short Communication)

1974 ◽  
Vol 143 (3) ◽  
pp. 775-777 ◽  
Author(s):  
John L. Wood
Keyword(s):  
Hydrogen Bonding ◽  
Dissociation Constant ◽  
Small Proportion ◽  
Association Constant ◽  
Short Communication ◽  
Dibasic Acid ◽  
Ph Dependence ◽  
Ph Values ◽  
Conjugate Acid ◽  
Total Base

The pH-dependence of the degree of hydrogen-bonding between a base and its conjugate acid is considered. When only a small proportion of the total base is complexed, the amount complexed is proportional to (1+coshp)−1 where p=2.303 (pKa–pH), pKa being the dissociation constant of the conjugate acid. This represents sharp pH-dependence. As the proportion complexed increases, the curve broadens, eventually becoming flat-topped, with more than half the base complexed over the range of pH values pKa±logKC, approximately. (K is the complex association constant and C is the formal base concentration, including all forms.) There are similarities to the extent of mono-protonation of a dibasic acid.

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