scholarly journals Studies on the application of the quinhydrone electrode in formamide. III. The ionization constants and related thermodynamic quantities of phthalic acid frome.m.f. measurements at different temperatures

1975 ◽  
Vol 28 (4) ◽  
pp. 793 ◽  
Author(s):  
UN Dash ◽  
B Nayak
Keyword(s):  
Phthalic Acid ◽  
Silver Chloride ◽  
Ionization Constants ◽  
Thermodynamic Quantities ◽  
Liquid Junction ◽  
Different Temperatures ◽  
Silver Silver ◽  
Silver Silver Chloride

The first and second ionization constants of phthalic acid have been determined, in formamide, at temperatures ranging from 5� to 45�C at 5� intervals, with the help of cells without liquid junction using quinhydrone and silver-silver chloride electrodes. By means of the Bjerrum equation, the distance r between the acidic groups has been estimated in formamide at different temperatures.

Thermodynamics of ionization of trans-crotonic and adipic acids in water; the silver – silver adipate electrode

1980 ◽  
Vol 58 (4) ◽  
pp. 323-327 ◽  
Author(s):  
Upendra Nath Dash ◽  
Uttam Kumar Nayak
Keyword(s):  
Adipic Acid ◽  
Silver Chloride ◽  
Ionization Constants ◽  
Thermodynamic Quantities ◽  
Liquid Junction ◽  
Different Temperatures ◽  
Heat Capacity Changes ◽  
Silver Silver ◽  
Silver Silver Chloride ◽  
Thermodynamics Of Ionization

The ionization constant, K, of trans-crotonic acid, and the first and second ionization constants, K1 and K2, of adipic acid have been determined in water at seven different temperatures ranging from 15 to 45 °C with the help of the cells without liquid junction using silver – silver chloride and quinhydrone electrodes. The variations of pK, pK1, and pK2 with temperature have been expressed by the equations[Formula: see text]and[Formula: see text]From the temperature coefficient of the ionization constants, the standard enthalpy, entropy, Gibbs energy, and heat capacity changes of the corresponding dissociation processes have been calculated. Using the values of ionization constants of adipic acid, the standard potential of the Ag(s)/Ag2Ad(s)/Ad2− electrode, and the related standard thermodynamic quantities for the electrode process[Formula: see text]have been calculated in water at those temperatures.

Studies on the application of the quinhydrone electrode in formamide. II. The ionization constants of phthalic acid from E.M.F. measurements at 25°

1973 ◽  
Vol 26 (1) ◽  
pp. 115 ◽  
Author(s):  
B Nayak ◽  
UN Dash
Keyword(s):  
Phthalic Acid ◽  
Silver Chloride ◽  
Ionization Constants ◽  
Liquid Junction ◽  
Silver Silver ◽  
Silver Silver Chloride

The first and the second ionization constants of phthalic acid have been determined, in formamide, at 25� with the help of cells without liquid junction using quinhydrone and silver-silver chloride electrodes. The values of pK1a and pK2a were found to be 4.214�0.02 and 7.716�0.01, respectively, at this temperature.

Potentiométrie de précision à basse température dans les mélanges eau – éthylène glycol; grandeurs thermodynamiques relatives aux ionisations de l'acide acétique et du solvant mixte

1983 ◽  
Vol 61 (10) ◽  
pp. 2344-2348 ◽  
Author(s):  
Hamed Bahri ◽  
Jean-Claude Hallé ◽  
Robert Schaal
Keyword(s):  
Ethylene Glycol ◽  
Electromotive Force ◽  
Dissociation Constants ◽  
Silver Chloride ◽  
Force Measurements ◽  
Liquid Junction ◽  
Solvent Water ◽  
Electromotive Force Measurements ◽  
Silver Silver ◽  
Silver Silver Chloride

Electromotive force measurements of cells without liquid-junction containing hydrogen electrodes and silver – silver chloride electrodes have been used to derive the dissociation constants of acetic acid and solvent water – ethylene glycol mixtures (50 and 70 mass % of ethyleneglycol) at 14 temperatures from −35 to 30 °C. Primary acidity standards related to these acetic buffered and sodium hydroxide solutions are given.

Standard potential of silver-silver chloride electrode and related thermodynamic quantities in glycerol at 5 to 45°C

1972 ◽  
Vol 34 (1) ◽  
pp. 101-107
Author(s):  
Rabindra N. Roy ◽  
William Vernon ◽  
James J. Gibbons ◽  
Alfred L.M. Bothwell
Keyword(s):  
Silver Chloride ◽  
Thermodynamic Quantities ◽  
Standard Potential ◽  
Silver Chloride Electrode ◽  
Silver Silver ◽  
Silver Silver Chloride
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