Solubility in the potassium stannate – potassium hydroxide – water system at 0 to 95.0 °C

1968 ◽  
Vol 46 (16) ◽  
pp. 2715-2719 ◽  
Author(s):  
P. Rosenblum
Keyword(s):  
Potassium Hydroxide ◽  
Invariant Point ◽  
Water System ◽  
Phase Relations ◽  
Polarizing Microscope ◽  
Solid Phases ◽  
Hydroxide Water

Solubilities and phase relations have been determined in the K2Sn(OH)6–KOH–H2O system between 0 and 95.0 °C. The isotherms consist of only one major solubility branch, that of K2Sn(OH)6, while the solubility branch of KOH is indistinguishable, since the isothermal invariant point is extremely close to the solubility of potassium hydroxide. Solid phases have been determined by Schreinemakers' method and checked with the polarizing microscope.

Physicochemical properties of the potassium hydroxide-water system. Range: 55 to 85 weight percent and 120.degree. to 250.degree.

1967 ◽  
Vol 12 (4) ◽  
pp. 465-472 ◽  
Author(s):  
Wolfgang M. Vogel ◽  
K. J. Routsis ◽  
Victor J. Kehrer ◽  
Douglas A. Landsman ◽  
Johann G. Tschinkel
Keyword(s):  
Physicochemical Properties ◽  
Potassium Hydroxide ◽  
Water System ◽  
Weight Percent ◽  
Hydroxide Water

RECIPROCAL SALT PAIRS, INVOLVING THE CATIONS Li2, Na2, AND K2, THE ANIONS SO4, AND Cl2, AND WATER, AT 25 °C

1958 ◽  
Vol 36 (11) ◽  
pp. 1511-1517 ◽  
Author(s):  
A. N. Campbell ◽  
E. M. Kartzmark ◽  
E. G. Lovering
Keyword(s):  
Sodium Chloride ◽  
Potassium Chloride ◽  
Mole Fraction ◽  
Lithium Chloride ◽  
Invariant Point ◽  
Double Salt ◽  
Potassium Sulphate ◽  
Lithium Sulphate ◽  
Solid Phases ◽  
Chloride Monohydrate

In the reciprocal salt pair Li2, K2, Cl2, SO4, and water, at 25 °C there are large areas in which potassium sulphate and potassium lithium sulphate (KLiSO4) are separately in equilibrium with solution. Two incongruent invariant points exist. At one of these the composition of the solution is 0.917 mole fraction chloride, 0.437 mole fraction lithium, and 19.4 moles of water per total mole of salt, the equilibrium solid phases being potassium chloride, potassium sulphate, and the double salt. At the second, the composition of the solution is 0.967 mole fraction chloride, 0.870 mole fraction lithium, and 13.8 moles of water per mole of salt, the solid phases being potassium chloride, double salt, and lithium sulphate monohydrate. One congruent invariant point exists, at which the composition of the solution is 1.00 mole fraction chloride, 0.960 mole fraction lithium, and 9.6 moles of water per mole of salt, the solid phases being lithium sulphate monohydrate, lithium chloride monohydrate, and potassium chloride.In the reciprocal salt pair Li2, Na2, Cl2, SO4, and water, at 25 °C there is an incongruent invariant point at which the composition of the solution is 0.873 mole fraction chloride, 0.668 mole fraction lithium, and 15.1 moles water per total mole of salt, the solid phases being sodium chloride, solid solution of sodium and lithium sulphates, and lithium sulphate monohydrate. A congruent invariant point exists, at which the composition of the solution is practically entirely lithium chloride, the solid phases present being lithium chloride monohydrate, lithium sulphate monohydrate, and sodium chloride.

Clathrate and other solid phases in the tetrahydrofuran–water system: thermal conductivity and heat capacity under pressure

1982 ◽  
Vol 60 (7) ◽  
pp. 881-892 ◽  
Author(s):  
Russell G. Ross ◽  
Per Andersson
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Water System ◽  
Clathrate Hydrate ◽  
Transient Hot Wire ◽  
Guest Molecules ◽  
Hydrate Phase ◽  
Wire Method ◽  
Solid Phases ◽  
Thermal Conductivity Λ

Solid phases in the tetrahydrofuran–water (THF–H2O) system were investigated in the temperature range 100–260 K and at pressures up to 1.5 GPa. Thermal conductivity, λ, and heat capacity per unit volume, ρcp, were measured, using the transient hot-wire method. We made measurements on solid phases having nominal compositions THF•17H2O, THF•7•1H2O, and THF•4•6H2O, which we refer to as phases α, β, and γ, respectively. Phase α is known to be a structure II clathrate hydrate, and λ for this phase was found to be similar to other crystalline solids which are glass-like in relation to their thermal properties. Low-energy excitations are known to be relevant to the properties of glass-like solids, and, in the case of phase α, were probably rotational vibrations of the THF guest molecules. Phase β was similar, and we inferred that it was probably a structure I clathrate hydrate. Phase γ behaved nearly like a normal crystal phase at low temperatures, but λ became almost independent of temperature near melting. At 1.1 GPa and 130 K, we found evidence that phase α transformed, on pressurization, to a metastable modification which may be a new high-density form of clathrate hydrate. The astrophysical implications of our results were mentioned briefly.

The Cellulose — Sodium Hydroxide — Water System in the Cyanoethylation of Cotton Cellulose

1956 ◽  
Vol 26 (7) ◽  
pp. 518-523 ◽  
Author(s):  
J.W. Weaver ◽  
Elias Klein ◽  
Beverly G. Webre ◽  
Elsie F. DuPré
Keyword(s):  
Sodium Hydroxide ◽  
Water System ◽  
Cotton Cellulose ◽  
Hydroxide Water

Characterisation of solid phases in the iron–sulphate–water system where silver is present

2018 ◽  
Vol 57 (4) ◽  
pp. 405-415
Author(s):  
A. A. Gunaratnam ◽  
D. B. Dreisinger ◽  
Y. Choi
Keyword(s):  
Water System ◽  
Iron Sulphate ◽  
Solid Phases ◽  
Sulphate Water

scholarly journals A Study of the Inosine–Sodium Hydroxide–Water and Inosine–Potassium Hydroxide–Water Systems

1974 ◽  
Vol 47 (10) ◽  
pp. 2556-2558 ◽  
Author(s):  
Yoshihisa Suzuki ◽  
Tadao Toki
Keyword(s):  
Sodium Hydroxide ◽  
Potassium Hydroxide ◽  
Water Systems ◽  
Hydroxide Water

Phase Relations in the Nitric Acid-Nitrogen Dioxide-Water System at Physicochemical Equilibrium.

1959 ◽  
Vol 4 (1) ◽  
pp. 22-32
Author(s):  
W. B. Kay ◽  
M. D. Sanghvi
Keyword(s):  
Nitric Acid ◽  
Nitrogen Dioxide ◽  
Water System ◽  
Phase Relations
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