| 溶液中钪与草酸离子的配位作用 |
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| 引用本文： | 许绍权.溶液中钪与草酸离子的配位作用[J].高等学校化学学报,1985,6(10):866. |
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| 作者姓名： | 许绍权 |
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| 作者单位： | 华南师范大学化学系 |
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| 摘 要： | 提钪工艺中常使草酸钪溶于过量草酸铵溶液中。但文献中有关钪与草酸离子配位作用的报导甚少。等用分光光度法测定了ScC2O4+配离子的稳定常数,而J·Stary则用分配法测定了SC(C2O4)33-配离子的稳定常数,这些工作都没有对溶液中可能生成各级配离子进行研究。
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| 收稿时间： | 1984-06-19 |
Coordination of Scandium with Oxalate Ions in Aqueous Medium |
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| Xu Shaoquan.Coordination of Scandium with Oxalate Ions in Aqueous Medium[J].Chemical Research In Chinese Universities,1985,6(10):866. |
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| Authors: | Xu Shaoquan |
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| Institution: | Department of Chemistry, South China Normal University, Guangzhou |
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| Abstract: | The solubilities of scandium-oxalate in solutions of various concentration of ammonium oxalate and ammonium perchlorate (the latter is to maintain a constant ionic strength of 2) were measured at 25℃. The existence of complexes ions ScC2O4]+Sc(C2O4)2]- and Sc(C2O4)2]3- have been revealed from the treatment of experimented data by useing of qraphic extrapolation. The solubility product of scandium oxalate was also calculated to be 1.22×10-22 (μ = 2, pH=1). The succesive stability constants of the complexes formed were calculated by two ways: relaxation method and a least-squares technique on a computer. The results are as follows: β1 = 1.94 × 108; β2 = 5.5 × 1015; β5 = 2.0 × 1016. |
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