scholarly journals DETERMINATION OF ALKALINITY AND DISSOCIATION CONSTANTS OF HIGH SALINITY WATERS: USE OF F5BC TITRATION FUNCTION

2018 ◽  
Vol 35 (2) ◽  
pp. 79
Author(s):  
Bernadete F. Cavalcanti ◽  
Lourdes Cristina Lucena Agostinho ◽  
Luciano Nascimento
Keyword(s):  
Natural Waters ◽  
Dissociation Constants ◽  
A Priori ◽  
Linear Regression Analysis ◽  
Liquid Junction ◽  
Carbonate System ◽  
Ph Measurements ◽  
Apparent Dissociation Constant ◽  
Junction Potential

Measurements of parameters expressed in terms of carbonic species such as Alkalinity and Acidity of saline waters do not analyze the influence of external parameters to the titration such as Total free and associated Carbonic Species Concentration, activity coefficient, ion pairing formation and Residual Liquid Junction Potential in pH measurements. This paper shows the development of F5BC titration function based on the titrations developed by Gran (1952) for the carbonate system of natural waters. For practical use, samples of saline watersfrom Pocinhos reservoir in Paraiba were submitted to titration and linear regression analysis. Results showed that F5BC involves F1x and F2x Gran functions determination, respectively, for Alkalinity and Acidity calculations without knowing “a priori” the endpoint of the titration. F5BC also allows the determination of the First and Second Apparent Dissociation Constant of the carbonate system of saline and high ionic strength waters.

scholarly journals Determination of Alkalinity and dissociation constants of high salinity waters: use of F5BC titration function

2010 ◽  
Vol 35 (2) ◽  
pp. 79-87
Author(s):  
B.F Cavalcanti ◽  
L.C.L Agostinho ◽  
L Nascimento
Keyword(s):  
Natural Waters ◽  
Dissociation Constants ◽  
A Priori ◽  
Linear Regression Analysis ◽  
Liquid Junction ◽  
Carbonate System ◽  
Apparent Dissociation Constant ◽  
Saline Waters ◽  
Junction Potential

Measurements of parameters expressed in terms of carbonic species such as Alkalinity and Acidity of saline waters do not analyze the influence of external parameters to the titration such as Total free and associated Carbonic Species Concentration, activity coefficient, ion pairing formation and Residual Liquid Junction Potential in pH measurements. This paper shows the development of F5BC titration function based on the titrations developed by Gran (1952) for the carbonate system of natural waters. For practical use, samples of saline waters from Pocinhos reservoir in Paraiba were submitted to titration and linear regression analysis. Results showed that F5BC involves F1x and F2x Gran functions determination, respectively, for Alkalinity and Acidity calculations without knowing "a priori" the endpoint of the titration. F5BC also allows the determination of the First and Second Apparent Dissociation Constant of the carbonate system of saline and high ionic strength waters.

Determination of sulfuric acid first dissociation constants to 400°C and 32MPa by potentiometric pH measurements

2004 ◽  
Vol 31 (3) ◽  
pp. 295-299 ◽  
Author(s):  
Kiwamu Sue ◽  
Munehiro Uchida ◽  
Tadafumi Adschiri ◽  
Kunio Arai
Keyword(s):  
Sulfuric Acid ◽  
Dissociation Constants ◽  
Ph Measurements

Determination of Dissociation Constants of Hexanoic, Heptanoic, and Benzoic Acids to 673 K and 30 MPa by Potentiometric pH Measurements

2010 ◽  
Vol 55 (11) ◽  
pp. 4823-4826 ◽  
Author(s):  
Kiwamu Sue ◽  
Teruaki Morita ◽  
Kumiko Totsuka ◽  
Yoshihiro Takebayashi ◽  
Satoshi Yoda ◽  
...  
Keyword(s):  
Dissociation Constants ◽  
Benzoic Acids ◽  
Ph Measurements
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