Solubility products and transfer activity coefficients of potassium picrate, potassium tetraphenylborate, and tetraphenylphosphonium picrate in methanol-water mixtures at 25.degree.C

1979 ◽  
Vol 24 (3) ◽  
pp. 215-218 ◽  
Author(s):  
Pat J. LaBrocca ◽  
Rebecca Phillips ◽  
Sidney S. Goldberg ◽  
Orest Popovych
Keyword(s):  
Activity Coefficients ◽  
Transfer Activity ◽  
Solubility Products ◽  
Potassium Picrate

Solubility products and transfer activity coefficients of rubidium and cesium tetraphenylborates and tetraphenylarsonium picrate in methanol-water mixtures at 25.degree.C

1983 ◽  
Vol 28 (3) ◽  
pp. 316-318 ◽  
Author(s):  
Anna Berne ◽  
Barbara Wajsbrot ◽  
Phillip D. Klahr ◽  
Orest Popovych
Keyword(s):  
Activity Coefficients ◽  
Transfer Activity ◽  
Solubility Products

Propriétés de solvation des solutions concentrées en acide phosphorique

1986 ◽  
Vol 64 (3) ◽  
pp. 608-614 ◽  
Author(s):  
C. Louis ◽  
J. Bessière
Keyword(s):  
Activity Coefficients ◽  
Acid Solutions ◽  
Reduction Reactions ◽  
Basic Properties ◽  
Transfer Activity ◽  
Oxidation Reduction ◽  
Normal Potential ◽  
Oxygen Atoms

Solvation properties of ions inH2O–H3PO4 media (1–14 M) are characterized with their solvation transfer activity coefficients f. These are calculated from normal potential or solubility values, and indicate an increasing solvation for anions and decreasing solvation for cations in concentrated acid solutions. For each species, the range depends on its number of charges, on the existence of oxygen atoms in its structure, and on its basic properties. The consequences of variation of solvation on oxidation–reduction reactions and solubility properties are studied.

scholarly journals Chemical and geochemical modeling. Thermodynamic models for binary fluoride systems from low to very high concentration (> 35 m) at 298.15 K

2021 ◽  
Vol 8 (2) ◽  
pp. 1-15
Author(s):  
Stanislav Donchev ◽  
Tsvetan V. Tsenov ◽  
Christomir Christov
Keyword(s):  
Activity Coefficients ◽  
Binary Systems ◽  
Geochemical Modeling ◽  
Osmotic Coefficients ◽  
Model Parameters ◽  
Thermodynamic Models ◽  
High Concentration ◽  
Activity Data ◽  
Solubility Products ◽  
Very High

Abstract In this study we developed well validated thermodynamic models for solution behavior and solid-liquid equilibrium for all fluoride binary systems, for which activity data are available. The subject of modeling study are 5 fluoride systems of the type 1-1 (HF-H2O, NaF-H2O, KF-H2O, RbF-H2O, and CsF-H2O) and one of 1-2 type (H2SiF6-H2O) from low to very high concentration at 298.15 K. Models are developed on the basis of Pitzer ion interactions approach. The recommendations on mean activity coefficients (γ±) have been used to construct the model for HF-H2O system. To parameterize models for all other 5 binary systems we used all available raw experimental osmotic coefficients data (φ) for whole concentration range of solutions, and up to saturation point. The predictions of new developed here models are in excellent agreement with experimental osmotic coefficients data, and with recommendations on activity coefficients in binary solutions from low to very high concentration: up to 20 mol. kg−1 in HF-H2O, and up to 35.6 mol.kg−1 in CsF-H2O. The Deliquescence Relative Humidity (DRH (%)) and thermodynamic solubility products (as ln Ko sp) of 4 solid phases [NaF(s), KF.2H2O(s), RbF(s), and CsF(s)] have been determined on the basis of evaluated model parameters and using experimental m(sat) solubility data.

Physical significance of transfer activity coefficients for single ions

1974 ◽  
Vol 46 (13) ◽  
pp. 2009-2013 ◽  
Author(s):  
Orest. Popovych
Keyword(s):  
Activity Coefficients ◽  
Physical Significance ◽  
Transfer Activity

Transfer activity coefficients between some dipolar aprotic solvents and alcohols of salts composed of various anions and potassium complexed with Bis(4,4'(5')-t-butylbenzo)-18-crown-6

1983 ◽  
Vol 36 (9) ◽  
pp. 1753 ◽  
Author(s):  
Jr MK Chantooni ◽  
IM Kolthoff ◽  
G Roland
Keyword(s):  
Dimethyl Sulfoxide ◽  
Stability Constants ◽  
Propylene Carbonate ◽  
Activity Coefficients ◽  
Isopropyl Alcohol ◽  
The Other ◽  
Aprotic Solvents ◽  
Transfer Activity ◽  
Dipolar Aprotic Solvents

Stability constants, Kf(LK+) and Kf(LKX) = [LKX]/[L][KX] at 25� in the dipolar aprotic solvents acetone (Me2CO), acetonitrile (MeCN), propylene carbonate (pc), N,N-dimethylformamide (HCONMe2), dimethyl sulfoxide (Me2SO), as well as in the alcohols, methanol (MeOH), isopropyl alcohol (Pr1OH), and butan -1-ol (BuOH) have been determined, L being bis(4,4'(5')-t-buty1benzo)-18- crown-6 (di(BuBo)-18-cr-6). This crown is considerably more lipophylic than is dibenzo-18-crown-6. Values of Kf(LKX) have been found from values of Kf(LK+), KA(KX) and KA(LKX). Transfer activity coefficients, Me2COγS, have been calculated (based on the Parker proposal that γ(Ph4As+) = γ(BPh4-) between acetone and the various solvents used of K+, Br-, ClO4-, P1- (picrate), LK+, KX, and LKX. It is found that K+ is more strongly solvated in Me2CO than in the other aprotic solvents of low donicity. The reverse is true between Me2CO and HCONMe2 or Me2SO (even after correcting for the Born effect).

Stabilities in Water and Transfer Activity Coefficients between Nonaqueous Solvents and Water of 1 : 1 Complexes of 15,15-Dimethyl-16-crown-5 with Metal Ions

2001 ◽  
Vol 74 (2) ◽  
pp. 311-315 ◽  
Author(s):  
Shoichi Katsuta ◽  
Takako Motoyama ◽  
Yasuyuki Takeda ◽  
Mikio Ouchi
Keyword(s):  
Metal Ions ◽  
Activity Coefficients ◽  
Nonaqueous Solvents ◽  
Transfer Activity
Sign in / Sign up

Export Citation Format

Share Document