journal article
LitStream Collection
Home
doi: 10.1007/BF00745878pmid: N/A
One of the possible methods of comparative calculation was used for calculating interatomic distancesd in gaseous alkali halides. The average deviation of the calculated values ofd from experimental values was 0.0012 A (for 15 substances).
doi: 10.1007/BF00745880pmid: N/A
1. The electronegativities of 36 elements in aqueous solutions have been calculated. 2. The electronegativities of metals in aqueous solutions are considerably lower than the standard values. However, electronegativities of nonmetals remain almost unchanged, and bonds therefore become more ionic in aqueous solutions. 3. The proposed electronegativity system accounts for some peculiarities in chemical reactions in aqueous solutions.
Lipis, L.; Pozharskii, B.; Fomin, V.
doi: 10.1007/BF00745881pmid: N/A
1. The formation of plutonium sulfate complex ions proceeds in a stepwise manner with increase of sulfuric acid concentration. The predominant formation of any particular complex ion occurs in a definite region of sulfuric acid concentrations. 2. The degree of complex formation and the stability of quadrivalent plutonium sulfate complexes decrease with rise of temperature. 3. In the formation of sulfate complex ions, the coordination number of plutonium remains unchanged and equal to the number of water molecules in the hydration sphere of the hydrated plutonium ion. Accordingly, plutonium sulfate complex ions can be represented by the formula [Pu(SO4)n(H2O)3-n]+4-2n, wheren may have values from 1 to 8.
Bogoyavlenskii, P.; K'o-min, Hsü
doi: 10.1007/BF00745882pmid: N/A
1. Solubility in the system KSCN-KCl-H2O at 25° was studied. As in the KSCN-KI-H2O system studied previously, the components do not form chemical compounds or solid solutions. 2. Solubilities in the systems KSCN-KI-H2O and KSCN-KCl-H2O were correlated with the structures of the component salts and of their saturated solutions. 3. The significant difference between the solubilities of thiocyanate and halides in the two systems is largely determined by structural differences between the SCN− anion and the I− and Cl− anions. 4. The high solubility of KSCN in binary and ternary solutions, in comparison with KI and KCl, is due to the relatively low stability of the short-range order of K+ and SCN− ions involved in crystallization and to the weak negative hydration of the SCN− anion. 5. Comparison of the average values of the substitution coefficients for KSCN, KI, and KCl forms the basis of certain purely qualitative concepts of the structural state of saturated solutions of these salts.
Bogoyavlenskii, P.; Li-hua, Wang
doi: 10.1007/BF00745883pmid: N/A
1. Solubilities in the system KNO2−KSCN−H2O at 25° were studied. It was found that the components do not form chemical compounds or solid solutions. 2. The high solubility of KNO2 in binary and ternary solutions of the systems KNO2−KCl−H2O and KNO2−KSCN−H2O is interpreted in the light of the structural characteristics of the NO2 anion. 3. Formation of solid solutions based on KNO2 in the system KNO2−KCl−H2O is due to partial replacement of NO 2 − ions by Cl− ions in the region of short-range order of K+ and NO 2 − ions, which is capable of crystallization from ternary solutions in accordance with the invariant KNO2 curve. 4. It follows from data on joint solubilities in the system KNO2−KSCN−H2O that transition of the structures of ternary solutions to closer packing, and the simultaneous presence of NO 2 − and SCN− ions in them favor the attainment of very high salt concentrations in the liquid phase.
Showing 1 to 10 of 16 Articles