Electrical conductance of 0.3[x sodium thiocyanate + (1 - x) potassium thiocyanate] + 0.7 sodium thiosulfate hydrate (Na2S2O3.cntdot.5.1H2O) melts

1990 ◽  
Vol 35 (3) ◽  
pp. 348-349 ◽  
Author(s):  
Shakira S. Islam ◽  
Kochi Ismail
Keyword(s):  
Sodium Thiosulfate ◽  
Electrical Conductance ◽  
Potassium Thiocyanate ◽  
Sodium Thiocyanate

Conductivity Study of Some Thiocyanate Salts in Aqueous Binary Mixtures of Tetrahydrofuran and 1,3-Dioxolane at 298.15 K

2010 ◽  
Vol 224 (06) ◽  
pp. 827-841 ◽  
Author(s):  
Riju Chanda ◽  
Mahendra Nath Roy
Keyword(s):  
Binary Mixtures ◽  
Structural Changes ◽  
Ion Pairs ◽  
Mixed Solvents ◽  
Tetrabutylammonium Bromide ◽  
Electrical Conductance ◽  
Ammonium Thiocyanate ◽  
Potassium Thiocyanate ◽  
Sodium Thiocyanate ◽  
Solvent Mixtures

AbstractElectrical conductance measurements are reported for different thiocyanate salts, viz. ammonium thiocyanate (NH4CNS), sodium thiocyanate (NaCNS) and potassium thiocyanate (KCNS), sodium bromide (NaBr), sodium tetraphenylborate (NaBPh4) and tetrabutylammonium bromide (Bu4NBr) in different mole fraction of water-tetrahydrofuran (THF) and water-1,3-dioxolane (1,3-DXL) binary mixtures at 298.15 K. The conductance data have been analyzed by the Fuoss conductance equation in terms of the limiting molar conductance (Λ0), the association constant (KA) and the association diameter (R). The limiting ionic conductances have been estimated from the appropriate division of the limiting molar conductivity value of the “reference electrolyte” Bu4NBPh4. Slight ionic association was found for all these electrolytes in these solvent mixtures. The results have been interpreted in terms of the formation of ion-pairs of ion–solvent interactions and structural changes in the mixed solvents.

Thermal properties of poly(ethylene oxide) complexed with sodium thiocyanate and potassium thiocyanate

1987 ◽  
Vol 20 (12) ◽  
pp. 3023-3034 ◽  
Author(s):  
C. Robitaille ◽  
S. Marques ◽  
D. Boils ◽  
J. Prud'homme
Keyword(s):  
Thermal Properties ◽  
Ethylene Oxide ◽  
Potassium Thiocyanate ◽  
Sodium Thiocyanate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Mixed anion effect in sodium thiocyanate + sodium thiosulfate + water systems

1998 ◽  
Vol 76 (12) ◽  
pp. 1836-1843 ◽  
Author(s):  
G Kalita ◽  
N N Dass ◽  
S Mahiuddin
Keyword(s):  
Key Words ◽  
Mole Fraction ◽  
Sodium Thiosulfate ◽  
Water Systems ◽  
Sodium Thiocyanate ◽  
Anion Effect ◽  
Temperature Range

Densities and viscosities of R[xNaSCN + (1 - x)Na2S2O3] + (1 - R)H2O systems with R = 0.05, 0.10, 0.14, and 0.18 were measured as functions of mole fraction, x (= 0.0-1.0), and temperature (293.15 <= T/K <= 323.15). A significant mixed anion effect has been observed within the temperature range of the study. The normalized viscosity isotherms were found to detect the mixed anion effect ~1.2 to 3.7 times more than the simple viscosity isotherms. The progressive replacement of S2O32- ions by SCN- ions causes the systems to be less structured and S2O32- ions polarized Na+ ions more towards themselves than towards the SCN- ions. Both these effects govern the variation of the viscosity with mole fraction, x. The mixed anion effect was found to vanish at around R = 0.0106.Key words: mixed anion effect, sodium thiocyanate, sodium thiosulfate, viscosity.

scholarly journals A Brief Review of Fly-ash Based Geopolymer Concrete

2021 ◽  
pp. 230-237
Author(s):  
Vaibhavi G Galande ◽  
Harshavardhan U Kamble
Keyword(s):  
Fly Ash ◽  
Thermal Power ◽  
Acid Resistance ◽  
Potassium Thiocyanate ◽  
Sodium Thiocyanate ◽  
Geopolymer Concrete ◽  
Conventional Concrete ◽  
Concrete Material ◽  
Concrete Mix Design ◽  
Test Result

Geopolymer concrete can be the future of the conventional concrete and it can be used as replacement agent instead of conventional concrete in construction work along with that the GPC is eco friendly in nature as it does not emits CO2 in atmosphere so it is helpful to reduce the Greenhouse effect. The material used for the manufacturing of GPC are Binder’s and Actuators. Birder’s are obtained from the thermal power plant also known as fly ash and actuator consist of the sodium silicate and sodium hydroxide, calcium chloride, sodium thiocyanate, potassium thiocyanate, etc. By combing these acceleration and Binder’s with other concrete material the process of Geopolymeration starts. The objective of these study is to give a detailed review on the geopolymer concrete mix design, compressive behavior, flexural and split tensile behavior and chemical acid resistance when immersed in sopheric acid and nitric acid by using various research paper and the test result difference of conventional concrete and geopolymer concrete. Based on that a review is prepared.

Sodium nitroprusside-induced cyanide intoxication and prevention with sodium thiosulfate prophylaxis

1992 ◽  
Vol 1 (2) ◽  
pp. 19-25 ◽  
Author(s):  
VA Hall ◽  
JM Guest
Keyword(s):  
Critical Care ◽  
Sodium Nitroprusside ◽  
Antihypertensive Agent ◽  
Care Setting ◽  
Sodium Thiosulfate ◽  
Sodium Thiocyanate ◽  
Cyanide Poisoning ◽  
Prevention And Treatment ◽  
Cyanide Intoxication ◽  
Sulfur Donor

Sodium nitroprusside is an antihypertensive agent used frequently in the critical care setting. Recently, the Food and Drug Administration (FDA) published a report that led to a labeling change emphasizing the pharmacokinetics of nitroprusside with metabolism to highly toxic cyanide. Although evidence validates that cyanogenesis occurs with nitroprusside administration, prevention and treatment of cyanide poisoning is rarely instituted in clinical practice. Simultaneous infusion of thiosulfate with nitroprusside provides the sulfur donor necessary to prevent cyanide accumulation. Cyanide combines with thiosulfate to form the less toxic sodium thiocyanate, which is then excreted. A 10:1 ratio of nitroprusside to thiosulfate in the infusion eliminates the possibility of cyanide intoxication without altering the efficacy of nitroprusside.

scholarly journals Mixed alkali effect in sodium thiosulfate pentahydrate melt

1988 ◽  
Vol 66 (2) ◽  
pp. 242-245 ◽  
Author(s):  
Shakira S. Islam ◽  
Kochi Ismail
Keyword(s):  
Glass Transition ◽  
Sodium Thiosulfate ◽  
Electrical Conductance ◽  
Molar Conductance ◽  
Polarization Model ◽  
Density Data ◽  
Mixed Alkali ◽  
Mixed Alkali Effect ◽  
Arrhenius Temperature Dependence ◽  
Arrhenius Temperature

Density and electrical conductance measurements of 0.35[XNaNO3 + (1 − X)KNO3] + 0.65Na2S2O3•5H2O melt were made as functions of temperature and X. Molar volume, V, is found to be additive. The percent deviation of Vext (extrapolated V of the pure solute from the plot of V vs. total added alkali ion fraction) from Vcal (calculated V of the pure solute from its high temperature density data) increases monotonically as the amount of NaNO3 in the hydrate melt increases, thereby manifesting a "structure-forming" tendency of NaNO3. The non-Arrhenius temperature dependence of molar conductance, Λ is analyzed in terms of the Vogel–Tammann–Fulcher (VTF) equation. Mixed alkali effect (MAE) has been observed on Λ and T0 (ideal glass transition temperature). A competitive polarization model has been used to explain the MAE on Λ.

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