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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 2, Number 2
BKCSDE 2(2)
February 20, 1981

Title	Study on the Elution Behaviors of Molybdate and Tungstate in Both Hydrochloric and Perchloric Acid by Anion Exchange Chromatography
Author	Ki-Won Cha, Jae-Sung Choi, Kee-Chae Park
Keywords
Abstract	The elution behaviors of molybdate and tungstate through anion exchange column have been investigated in the various concentration of hydrochloric and perchloric acid. A discussion is made to evaluate the existing these equilibrium and constant according to acidity. In both acids of 0.01-2.0 M concentration range, the existing equilibrium for molybdate and its constant calculated at 20℃ is 1018.9 for Mo8O24- + 20H+ ↔ 8MoO22+ + 10H2O. In the 3-3.5 M hydrochloric acid it is 0.16 for MoO2Cl2 + Cl- ↔ MoO2Cl3- and for the case of tungstate, in the both acids of 0.01-1.0 M concentration range 106.6 for W12O396- + 6H+ ↔ 12WO3·3H2O. In higher concentration than 1.0 M both acids the following equilibrium seems to be existed. 12WO3·3H2O ↔ 12WO3 + 3H2O
Page	37 - 41
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