| 锌与羟基的配位作用及晶状氢氧化锌的溶度积 |
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| 引用本文： | 许绍权,许聆彦. 锌与羟基的配位作用及晶状氢氧化锌的溶度积[J]. 华南师范大学学报(自然科学版), 2002, 0(4): 7-9 |
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| 作者姓名： | 许绍权 许聆彦 |
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| 作者单位： | 1. 华南师范大学化学系,广东,广州,510631
2. 爱立信公司,广东,广州,510000 |
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| 摘 要： | 为对文献[1]报道的ε-Zn（OH）2的溶度积值作更准确的测定,用溶解度法研究了Zn2+与羟基的配位作用,在25℃下测定了ε-Zn（OH）2在不同浓度氢氧化钠溶液中的溶解度（μ=2）.在所研究体系中揭示出存在Zn（OH）+,Zn（OH）20,Zn（OH）3-和Zn（OH）42-配离子.用图解法和松驰法计算出相应配离子的稳定常数相一致,结果为:β1=8.1×104,β2=6.3×1011,β3=3.9×1014,β4=1.2×1018.同时求出了更为准确的ε-Zn（OH）2的溶度积Ksp=10×10-17.
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| 关 键 词： | 锌 羟基 配位作用 晶状氢氧化锌 ε－氢氧化锌 溶度积 羟合配离子 累积稳定常数 溶解度法 |
| 文章编号： | 1000-5463(2002)04-0007-03 |
| 修稿时间： | 2002-04-30 |
COORDINATION OF ZINC WITH HYDROXO- IONS IN AQUEOUS MEDIUM AND SOLUBILITY PRODUCT FOR ε - Zn(OH)2 CRYSTAL |
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| XU Shao - quan,XU Ling - yan. COORDINATION OF ZINC WITH HYDROXO- IONS IN AQUEOUS MEDIUM AND SOLUBILITY PRODUCT FOR ε - Zn(OH)2 CRYSTAL[J]. Journal of South China Normal University(Natural Science Edition), 2002, 0(4): 7-9 |
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| Authors: | XU Shao - quan XU Ling - yan |
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| Abstract: | The solubility value of e - Zn(OH)2 crystal in solutions of various concentration of sodium hydroxide and sodium perchlorate (with a constant ionic strength of 2) were measured at 25C . The existence of complexes ions Zn(OH) + , Zn(OH)02, Zn(OH)3- and Zn(OH)2-4 has been revealed from the treatment of experiment data with the help of graphic extrapolation. The successive stability constants of the complexes formed were calculated by two methods: graphic extrapolation and relaxation method respectively. The results are as following: B1 = 8.1 x104, B2 = 6.3x1011,B3 = 3.9x 1014,B4 = 1.2x 1018. The solubility product of e - Zn (OH)2 was also calculated to be 1.0 x 10~17(u = 2.25 C), which corrects the numerical value reported in a previous reference. |
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| Keywords: | Zinc hydroxide solubility product hydroxo - complex Ions of Zinc cumulative stability constant solubility method |
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