ACID DISSOCIATION CONSTANTS AND COMPLEX FORMATION CONSTANTS OF SEVERAL PYRIMIDINE DERIVATIVES1

1961 ◽  
Vol 65 (9) ◽  
pp. 1570-1574 ◽  
Author(s):  
Edmond R. Tucci ◽  
Br. Edward Doody ◽  
Norman C. Li
Keyword(s):  
Complex Formation ◽  
Dissociation Constants ◽  
Formation Constants ◽  
Acid Dissociation ◽  
Acid Dissociation Constants ◽  
Complex Formation Constants

Studies of reagents for spectrophotometric measurement of ionic magnesium

1977 ◽  
Vol 55 (22) ◽  
pp. 3909-3914 ◽  
Author(s):  
Dennis G. McMinn ◽  
Byron Kratochvil
Keyword(s):  
Complex Formation ◽  
Dissociation Constants ◽  
Formation Constants ◽  
Acid Dissociation ◽  
Disulfonic Acid ◽  
Acid Dissociation Constants ◽  
Spectrophotometric Measurement ◽  
Ph Range ◽  
Metal Ligand ◽  
The Ideal

Four mono-azo aryl dyes having the o-carboxy-o′-hydroxy functionality were investigated as reagents for the measurement of ionic Mg2+ in solutions containing complexing ligands. 2-(2′-Carboxyl-1′-benzeneazo)-1,8-dihydroxynaphthalene-3,6-disulfonic acid came closest to the ideal of having absorbance unaffected by pH over the pH range of interest and of differentiating between Ca2+ and Mg2+ complex formation. Ligand acid dissociation constants and formation constants for the metal–ligand complexes were measured.

Effect of Weak Acid Additions on the General and Localized Corrosion Susceptibility of Alloy 22 in Chloride Solutions

2008 ◽  
Vol 1107 ◽  
Author(s):  
Ricardo M. Carranza ◽  
C. Mabel Giordano ◽  
Martín A. Rodríguez ◽  
Raul B. Rebak
Keyword(s):  
Organic Acids ◽  
Crevice Corrosion ◽  
Electrochemical Impedance ◽  
Dissociation Constants ◽  
Formation Constants ◽  
Localized Corrosion ◽  
Acid Dissociation ◽  
Complex Formation Constants ◽  
Chloride Solutions ◽  
Alloy 22

AbstractElectrochemical studies such as cyclic potentiodynamic polarization (CPP) and electrochemical impedance spectroscopy (EIS) were performed to determine the corrosion behavior of Alloy 22 (N06022) in 1M NaCl solutions at various pH values from acidic to neutral at 90°C. All the tested material was wrought Mill Annealed (MA). Tests were also performed in NaCl solutions containing weak organic acids such as oxalic, acetic, citric and picric acids.Results show that the CR of Alloy 22 was significantly higher in solutions containing oxalic acid than in solutions of pure NaCl at the same pH. Citric and Picric acids showed a slightly higher CR, and Acetic acid maintained the CR of pure chloride solutions at the same pH. Organic acids revealed to be weak inhibitors for crevice corrosion. Higher concentration ratios, compared to nitrate ions, were needed to completely inhibit crevice corrosion in chloride solutions.Results are discussed considering acid dissociation constants, buffer capacity and complex formation constants of the different weak acids.

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