SCIENTIFIC ABSTRACT TEZAK, B. - TEZIKOV, S.D.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001755520008-8
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: March 14, 2001
• Sequence Number: 8
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

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A systtniatization and cemparisms of We mi.rqrous ~ii~ta in
coniplex -oly. Of Ag halides and AgSCN obtained by vuri,u i
teclinicium was made. The re:iults are rcprv~eritol ai ploc~
of the lo; of the total corica, vfAg P)m vs. (lie Irig of the tot;,l
n, of halide or SCN- ioui at the nuly, boundarics ts~-,
CA ed SOlY- dirves). "sfactory agrceme;lt b---tmTa tile
dat, Of various authors was noted. Except in thr PmIc saly.
reglotts" the effect of the ionic strengUt was "all or cuin-
pIcteiy absent. Complex zxjl)-. of Agel in snlns. of various
sol - thloridci inaeases In the order N114CI > KC1 - UCI >
NaCl > HC1 and RaCts > SrC!, > Cael, > Tt%e
effect of the accompanying cation from chloricle contvanout
decreases with the incre"itig.diin. of tLe wins. This waj
tentatively connected with the steric factors. The couiplux
;4oly, In the soIns, of the corresponding sol. lialide or SCN

sMts (for wa.
its. of solid phase greater than 10-4.21f) chunp-,
in the order AgSCN > Ag( > AgSr > AgCl. Inermia of
the complex anly. in the solts-of AgNO, is in the ordu AgI
> AgSCN > > AgCI, A higher corien. of Ag ions N
A
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neces for d
V1111; the Sam. amt. or solid phase tluin i
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uate the cr)rnpn.
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cOmplcX opecles sind t;i-ir stabdity consts. in the vaifous
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qf.,,MgW &Alj,~g raphic method was On

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t~ .ris Ot(, ordittati-- rq)rcient tht, c,vuil. cwi,t~;. of
4tc:M
,f Solid jklp) tile lo:wvirm
litir cotnpli-les. N.q). Tilt ~tabiht, t4 a C'ItIti"wx ~;i
r,tkio of dw- coitsr. !,!tI
At lii~h cr!nlli. of !!;A- ill cx(.C,;-%
tli~l of jvftnuc!~_ar comph~,:t
lirocc-durc dtv!riiwd the co:upR_-:( I`C,1111.3 17CIe 11mr-
pret---d wid the stability consti. -if tfic romplLx imis co-mpal ell.
with Vic' conclusiowi of other anthors. Exteabive tabl"
inclwli,i~, the authors. (lie refercincei, the cotica, rangti of
the CIMIl!"PlItnt in cxccsa, tile colnp!m of the
prescia, ,ind thp oursporiding -itability C0113113. we Rivril.
Lssientrilly the saint rc~ults were rc"clit!d by varitim ~-.utlwt~,
The reliability of tile interpretation of tile soly. clata b dis-
ato
_Sq iul!

YUGOSIAVIA/Thermodynamics. Thermochemistry. Equilibria. Physico- B-8
Chemical Analysis. Phase Transitions
Abs jour : Ref Zhur - KhimiYa, No 8, 1957, 26150
Author :J. Kratohvil,_P- _Tezgk-
Title :Methodics of Precipitation Processes. XI. Complex Solubility
of Silver Complex Halides and Silver Thiocyanate in Mixed
Solvents
Orig Pub : Arhiv kemije, 1954, 26, No 4, 243-256
Abstract : The solubility (L) of AgCl, AgBr, AgI and AgCNS in solutions
of halides and thiocyanates of alkaLi metals in isodielectric
mixtures (water - methyl alcohol, water - ethyl alcohol,
water - acetone) at 20 � 0.10 was studied. This process is
accompanied by the formation of complexes in the solution.
L increases with the increase of the concentration of the
organic component, and this increase means that less halide
ions containing in the canplex are necessary to tIL. solution
of the same amount of the solid phase. In mixtures of subs-
tances of equal dielectric constants (water - methyl alcohol,
Card 1/3

YUGOSIAVIA/Thermodynamics. Thermochemistry. Equilibria. Physico- B-8
Chemical Analysis. Phase Transitions.
Abs Jour : Ref Zhur - Rhirdya, No 8, 1957, 2615o
water - ethyl alcohol), L increases approximately regularly
(compared with L in pure water); water - acetone mixtures, in
which L is noticeably greater, is an exception. The differen-
ce between L of AgBr in solutions of XBr and NaBr is conser-
ved also at the dissolution in mixed solvents. L of silver
halides and thiocyanate decreases in all solvents (including
water) in the following order: AgCNS, AgI, AgBr, AgCl. L in
82% acetone is an exception, it decreases in the following
order: AgI, AgCNS, AgBr, AgCl. The anomaly of water-acetone
mixtures is connected with the change in the ion-dipole in-
terraction (formation of solvates). The less the dielectric
constant of the solvent is, the greater is the magnitude of
the stability constant of the canplex. The dielectric cons-
tants and the compositions of mixtures were computed by in-
terpolation basing on data published earlier (Akerlof G.,
J. Amer. Chem. Soc., 1932, 54, 4125). The values of ion so-
lubility at various magnitudes of the dielectric constants
Card 2/3

YUGOSIAVIA/Thermodynamics. Thermochemistry. Equilibria. Physico- B-8
Chemical Analysis. Phase Transitions.
Abs Jour Ref Zhur - Khimiya, No 8, 1957, 26150
necessary to the computation of the constants of stability
were obtained by means of the relation published earlier
(Iiicci J.E. and others, J. Amer. Chem. Soc., 1939, 61, 3274;
194o, 62, 407; j. Phys. Chem., 1941,45, 1o96; J. Amer. Chem.
Soc.., 1942, 64, 2305). The stability constants were compu-
ted by the method described earlier (RZhKhim, 1955, 26012).
The methodics of the work was published earlier (Schulz K.
and others, Arkhiv kem., 1951, 23, 200). See RZh I