Equilibria in acetic acid: the evaluation of the ionic association constant and limiting conductivity for the second component of a mixture

1965 ◽  
Vol 18 (3) ◽  
pp. 427 ◽  
Author(s):  
RJL Martin
Keyword(s):  
Acetic Acid ◽  
Association Constant ◽  
Ionic Association ◽  
Limiting Conductivity

Equilibria in acetic acid: Ionic association constant of acetamidium perchlorate and acid-base equilibrium constant of acetamidium acetate at 105.7°

1965 ◽  
Vol 18 (6) ◽  
pp. 801 ◽  
Author(s):  
RJL Martin
Keyword(s):  
Dielectric Constant ◽  
Acetic Acid ◽  
Equilibrium Constant ◽  
Association Constant ◽  
Ionic Association ◽  
Equivalent Conductivity ◽  
Acid Base ◽  
Base Equilibrium ◽  
Acid Base Equilibrium

In acetic acid at 105.7� acetamidium perchlorate has an ionic association constant KA = 0.0491 x 106 l. mole-1, a limiting equivalent conductivity A, = 79.4 cm2 Ω-1 equiv.-1, and a centre-to-centre distance between the ions � = 4.67 Ǻ. The acid-base equilibrium constant for acetamidium acetate KB = [ΣNH3Ac+ OAc-]/ [NH2Ac] increases slightly with increasing dielectric constant.

Equilibria in acetic acid: ionic association constant of oxonium perchlorate, acid-base equilibrium constant of oxonium acetate, and autoprotolysisconstant of acetic acid at 105.7°

1965 ◽  
Vol 18 (3) ◽  
pp. 321 ◽  
Author(s):  
RJL Martin
Keyword(s):  
Dielectric Constant ◽  
Acetic Acid ◽  
Equilibrium Constant ◽  
Association Constant ◽  
Ionic Association ◽  
Aqueous Acetic Acid ◽  
Equivalent Conductivity ◽  
Acid Base ◽  
Base Equilibrium ◽  
Acid Base Equilibrium

In aqueous acetic acid, 0.114-0.152M H2O, at 105.7�, oxonium perchlorate has limiting equivalent conductivity Λ0 90.7, ionic association constant KA = [H3O+ClO4-]/[H3O+][ClO4]f2 = 0.0310 x 106 and centre-to-centre distance between the ions (� = 4.84 Ǻ. The acid-base equilibrium constant for oxonium acetate KB = [ΣH3O+ OAc-]/[H2O] increases with the dielectric constant so that -log KB = 1.532+29.44/D. The autoprotolysis of acetic acid also increases with the dielectric constant.

Conductimetric studies of ionic association of tetraalkylammonium halides in iso-propanol + water mixtures at 25 °C. Part II.

1988 ◽  
Vol 66 (7) ◽  
pp. 1720-1727 ◽  
Author(s):  
Auaz Ahmad Ansari ◽  
M. R. Islam
Keyword(s):  
Dielectric Constant ◽  
Association Constant ◽  
Ionic Association ◽  
Size Parameter ◽  
Solvent Interactions ◽  
Tetraalkylammonium Ions ◽  
Conductance Data ◽  
Electrical Conductivities ◽  
Ion Size ◽  
Tetraalkylammonium Halides

Electrical conductivities of Me4NBr, Et4NBr, Pr4NBr, Bu4NBr, and Bu4PBr have been measured in isopropanol + water (2-PrOH + H2O) mixtures covering the approximate range of dielectric constant (71.40 ≥ D ≥ 19.40) at 25 °C. The conductance data have been analysed by using the Fuoss-1978 (F78) conductance equation and the results compared with those obtained from the Fuoss–Onsager–Skinner (FOS) equation. The values of the limiting equivalent conductance, Λ0, the association constant, KA, and the distance of ion-size parameter [Formula: see text] are computed from these data. A better fit of the conductance data was provided by the F78 equation. Ion–solvent interactions and effective sizes of tetraalkylammonium ions are also discussed in order to understand the magnitude of the ionic association. The overall association behaviour of these salts has been found to increase with decrease in dielectric constant of the medium.

The Conductance of Naland Tetraethylammonium Iodide in Mixtures of Methanol with Acetonitrile and Water

1991 ◽  
Vol 46 (1-2) ◽  
pp. 122-126 ◽  
Author(s):  
E. Hawlicka ◽  
R. Grabowski
Keyword(s):  
Salt Concentration ◽  
Association Constant ◽  
Ion Pairs ◽  
Solvent Composition ◽  
Ionic Association ◽  
Equivalent Conductance ◽  
Tetraethylammonium Iodide

AbstractThe conductance of Nal and Et4NI in methanol-acetonitrile and methanol-water mixtures was measured at 25 ± 0.005 °C for the whole range of the solvent compositions, the salt molarity ranging from 5 • 10-5 up to 1 • 10-2. Several equations describing the influence of the salt concentration on the equivalent conductance are examined and the Fuoss-Hsia equation with the Fernandez-Prini parameters is found to be the most appropriate one for systems with weak ionic association. Variations with the solvent composition of the limiting equivalent conductance, the distance between ions forming ion pairs and the association constant are discussed. Nonmonotonous changes of the association constant are concluded to be a feature of microheterogenous systems.

scholarly journals Association Constant of Acetic Acid in 1.02 m NaCl Aqueous Medium at Elevated Temperatures and Pressures

1987 ◽  
Vol 42 (8) ◽  
pp. 849-852
Author(s):  
P. Becker ◽  
B. A. Bilal
Keyword(s):  
Aqueous Solution ◽  
Acetic Acid ◽  
Association Constant ◽  
Elevated Temperatures ◽  
Concentration Cell ◽  
Pressure Concentration ◽  
Increasing Temperature ◽  
Apparent Association ◽  
High Temperature High Pressure ◽  
Apparent Association Constant

The association constant of acetic acid in 1.02 m (NaCl) aqueous solution has been determined potentiometrically at temperatures up to 260 °C and pressures up to 1005 bar. A high-temperature high-pressure concentration cell having two hydrogen electrodes has been used for the measurement. The apparent association constant Q′HAC increases with increasing temperature but decreases with increasing pressure: (Q′HAC)25 ° C, 108 bar = 2.86 · 104, (Q′HAC)25 ° C , 500bar = 2.7 · 104, (Q′HAC)200 °C, 500 bar = 4.65 · 104, (Q′HAC)26O °C, 1005 bar = 6.57 · 104 m−1.

Ectodesmata as Revealed By Freeze-Etch Preparations of Plant Epidermal Cell Walls

1973 ◽  
Vol 31 ◽  
pp. 468-469
Author(s):  
N.C. Lyon ◽  
W. C. Mueller
Keyword(s):  
Electron Microscopy ◽  
Acetic Acid ◽  
Nitric Acid ◽  
Oxalic Acid ◽  
Light Microscopy ◽  
Epidermal Cell ◽  
Cell Walls ◽  
Plant Viruses ◽  
Plant Leaves ◽  
Thin Sections

Schumacher and Halbsguth first demonstrated ectodesmata as pores or channels in the epidermal cell walls in haustoria of Cuscuta odorata L. by light microscopy in tissues fixed in a sublimate fixative (30% ethyl alcohol, 30 ml:glacial acetic acid, 10 ml: 65% nitric acid, 1 ml: 40% formaldehyde, 5 ml: oxalic acid, 2 g: mecuric chloride to saturation 2-3 g). Other workers have published electron micrographs of structures transversing the outer epidermal cell in thin sections of plant leaves that have been interpreted as ectodesmata. Such structures are evident following treatment with Hg++ or Ag+ salts and are only rarely observed by electron microscopy. If ectodesmata exist without such treatment, and are not artefacts, they would afford natural pathways of entry for applied foliar solutions and plant viruses.

Increased expression of an amino acid transporter LAT1 in healing of acetic acid-induced chronic gastric ulcer in rats

2001 ◽  
Vol 120 (5) ◽  
pp. A153-A153
Author(s):  
S MIYAMOTO ◽  
K KATO ◽  
Y ISHII ◽  
S ASAI ◽  
T NAGAISHI ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Gastric Ulcer ◽  
Amino Acid ◽  
Amino Acid Transporter ◽  
Chronic Gastric Ulcer ◽  
Acid Transporter

358: Intravesical Botulinum Toxin a Administration Produces Analgesia Against Acetic Acid Induced Bladder Pain Responses in Rats

2004 ◽  
Vol 171 (4S) ◽  
pp. 94-94
Author(s):  
Yao-Chi Chuang ◽  
Naoki Yoshimura ◽  
Chao-Cheng Huang ◽  
Po-Hui Chiang ◽  
Michael B. Chancellor
Keyword(s):  
Acetic Acid ◽  
Botulinum Toxin ◽  
Botulinum Toxin A ◽  
Toxin A ◽  
Bladder Pain ◽  
Pain Responses
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