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题名: Isopiestic determination of vapor pressures and osmotic coefficients andthe ion-interaction model for Li2B4O7-H2O system at 298.15 K
作者: Zhang, AY ;  姚颖 ;  Song, PS
刊名: CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
出版日期: 2004
卷号: 25, 期号:10, 页码:1934-1936
英文摘要: Isopiestic molalities, vapor pressures and osmotic coefficients of aqueous Li2B4O7 solutions from 0.0275 to 2.9397 mol/kg were determined at 298.15 K by using an improved apparatus. The rule of the changes in vapor pressure over aqueous Li2B4O7 solutions was revealed, which indicated that the bond of borate anions with water are better than that of NaCl. The different formation reaction equilibria for the species containing boron of boric acid and borate anions B(OH)(4)(-), B3O3(OH)(4)(-) and B4O5(OH)(4)(2-) in Li2B4O7 (aq) solutions were taken into account. The stoichiometric equilibrium constants for the formation reactions of the boron species and the ion-interaction parameters were estimated simultaneously by using Pitzer equations of osmotic coefficient with minor modifications. Sixteen parameters were obtained with a standard deviation 0.0055 for the ion-interaction model. Isopiestic molalities, vapor pressures and osmotic coefficients of aqueous Li2B4O7 solutions from 0.0275 to 2.9397 mol/kg were determined at 298.15 K by using an improved apparatus. The rule of the changes in vapor pressure over aqueous Li2B4O7 solutions was revealed, which indicated that the bond of borate anions with water are better than that of NaCl. The different formation reaction equilibria for the species containing boron of boric acid and borate anions B(OH)(4)(-), B3O3(OH)(4)(-) and B4O5(OH)(4)(2-) in Li2B4O7 (aq) solutions were taken into account. The stoichiometric equilibrium constants for the formation reactions of the boron species and the ion-interaction parameters were estimated simultaneously by using Pitzer equations of osmotic coefficient with minor modifications. Sixteen parameters were obtained with a standard deviation 0.0055 for the ion-interaction model.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.isl.ac.cn/handle/363002/2360
Appears in Collections:青海盐湖研究所知识仓储(2014年之前)_期刊论文

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Recommended Citation:
Zhang, AY,Yao, Y,Song, PS. Isopiestic determination of vapor pressures and osmotic coefficients andthe ion-interaction model for Li2B4O7-H2O system at 298.15 K[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2004,25(10):1934-1936.
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