| THE STATE OF CHROMIUM (Ⅲ) ION IN AQUEOUS SOLUTION |
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| 引用本文： | 罗勤慧,沈孟长,丁益,任建国,戴安邦.THE STATE OF CHROMIUM (Ⅲ) ION IN AQUEOUS SOLUTION[J].中国科学B辑(英文版),1986(8). |
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| 作者姓名： | 罗勤慧 沈孟长 丁益 任建国 戴安邦 |
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| 作者单位： | Coordination Chemistry Research Institute，Nanjing University，Coordination Chemistry Research Institute，Nanjing University，Coordination Chemistry Research Institute，Nanjing University，Coordination Chemistry Research Institute，Nanjing University，Coordination Chemistry Research Institute，Nanjing University |
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| 摘 要： | So far few systematic studies on the hydrolytic polymerization of Cr(Ⅲ) were reported because of inertness of the ion and complication of the process. We studied it in equilibrium by pH method systematically in a wide concentration range (0.0002—0.32 M). The results show that, in the low concentration range, the composition of the polynuclear hydrolysis products may be represented as Cr_3(OH)_4] (OH)_n (n=1,2,3); in the medium range, the composition of products as CrCr(OH)_2]_n~((3+n))~+ (n=1,2,3); in the high range, the composition of products as CrGr(OH)]_n~((3+2n))~+ (n=1, 2), and in the intermediate range between medium and high range where the hydrolysis system is in a transition state, the composition of products as Cr_3(OH)_3]~(6+) and Cr_3(OH)_4]~(5+). The values of hydrolysis constants of the identical species measured in different Cr concentration ranges and calculated by different methods were found in good agreement with each other. A predominance-arca diagram was made by using the hy
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