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Study on phase diagrams and properties of solutions in ternary systems Li + ,K + (Mg 2+ )/SO 4 2‐ ‐H 2 O at 25°C
Author(s) -
Li Bing,
Li Jun,
Fang ChunHui,
Wang QingZhong,
Song PengSheng
Publication year - 1995
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19950130204
Subject(s) - chemistry , phase diagram , solubility , thermodynamics , isothermal process , electrolyte , ternary numeral system , ternary operation , refractive index , phase (matter) , viscosity , analytical chemistry (journal) , conductivity , crystallization , chromatography , organic chemistry , quantum mechanics , computer science , programming language , physics , electrode
Solubilities of ternary systems Li + ,K + /SO 2‐ 4 ‐H 2 O (1) and Li + ,Mg 2+ /SO 4 2‐ ‐H 2 O (2) were investigated by isothermal method at 25°C. Physico‐chemical properties of solutions, such as density, refractive index, viscosity, conductivity and pH, were determined. Phase diagram of the system (1) consists of three solubility branches and three crystallization fields corresponding to K 2 SO 4 , Li 2 SO 4 ·H 2 O and LiKSO 4 . LiKSO 4 is an incongruent compound, and its transition point is estimated graphically to be 45.5–46.0°C. No solid solution of LiKSO 4 with Li 2 SO 4 ·H 2 O was found in the system. The system (2) is a simple eutonic type. Pitzer model of electrolyte solution was used to check the obtained solubilities. Data comparison gives good agreement. Two equations were used to correlate density, refractive index of the solution with its composition. Differences between measured and calculated values are less than 0.6% for density, 0.15% for the latter.