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Acidic dissociation constant
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In this study, the thermodynamic dissociation constants of two new quinoline derivatives including (6-hydroxyl-3-sulfoquinoline-7-yloxy) acetic acid and (5-bromo-6-hydroxyl-N-methyl-3-sulfoquinoline-7-yloxy) acetic acid were initially determined in an aqueous solution using potentiometric titration at (25.0 ± 0.1) oC in the ionic medium of 0.10 M KCl solution.
9p
visharma
20-10-2023
5
2
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The structure of the new acid and data of potentiometric titration were analyzed in detail before calculating and assigning the pKa values to suitable functional groups. These results will be applied to our further studies of this compound.
7p
vimaryamnawaz
04-08-2022
7
1
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The acid dissociation constant is an important parameter that affects the physicochemical properties of molecules in solution. A set of 20 phenolic compounds were used to establish a model to predict pKa values of phenolic compounds.
8p
vigeneralmotors
13-07-2022
3
2
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The present study includes important findings relating to the number of donor atoms, species of ligands, and stabilities of complexes. Stabilities of complexes between Cu(II) ion and NO-, NS-, ONS-, and ONO-type Schiff bases were compared. Acid-base properties of the Schiff bases were explained at 25±0.1◦C and ionic strength (I) of 0.1 M supported by NaCl. The Hyperquad computer program was used for calculation of dissociation and stability constants.
12p
langthannam
29-12-2021
14
0
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Lecture General Chemistry 2 - Chapter 18: Acid-Base Equilibria. After studying this section will help you understand: arrhenius acid-base definition, strong and weak acids, the acid dissociation constant, classifying the relative strengths of acids,...
79p
diepchilang
26-08-2021
7
1
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In this study, the dissociation constant of ethylammonium and 2-furoic acid have been determined at 298.15 K using a potentiometric titration method. The ionic strength of all solutions was maintained by 0.50 M of KCl solution. A series of pH was obtained by adding the same of volume of KOH solution into analytical solutions.
10p
tamynhan9
02-12-2020
8
2
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Salicylic aldehyde-N(4)-(4-ethoxyanilinyl)thiosemicarbazone (H2L) was synthesized by condensation between salicylic aldehyde (SA) and N(4)-(4-ethoxyanilinyl)thiosemicarbazide (TSCZ) in presence of glacial acetic acid as a homogeneous catalyst in ethanol. As a result of analysis by the surface response based on Box – Hunter model with the confidence level of 95%, the expectable yield reached the highest point (around 68%) at 80oC for 10 minutes when approximately 1 mole of SA reacted to equivalently 1 mole of TSCZ.
11p
vithomasedison2711
15-08-2019
29
0
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This publication contains the competition problems (Volume 2) from the 21-40, international Chemistry Olympiads (ICHO) organized in the years 1989-2008 and is a continuation of the publication that appeared last year as Volume 1 andcontained competition problems from the first twenty ICHOs.The whole review of the competition tasks set in the ICHO in its fourty-year history is a contribution of the ICHO International.
136p
vuongtuyetsuong
09-04-2017
111
8
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Duckd2-crystallin is a soluble tetrameric lens protein. In the presence of guanidinium hydrochloride (GdnHCl),it undergoes stepwise dissociation and unfolding. Gel-filtra-tion chromatography and sedimentation velocity analysis has demonstrated the dissociation of the tetramer protein to a monomeric intermediate with a dissociation constant of 0.34lM 3 . Dimers were also detected during the dissociation and refoldingprocesses.
8p
tumor12
20-04-2013
32
1
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Dissociation Constants Of Organic Acids And Bases: This table lists the acid-base dissociation constants of over 600 organic compounds, including many amino acids. All data apply to dilute aqueous solutions and are presented in the form of pKa, which is the negative of the logarithm of the acid dissociation constant Ka.
17p
anhngoc007
23-11-2010
358
46
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