K_2FeO_4在稀KOH溶液中的稳定性研究
Stability of K_2FeO_4 in Dilute KOH Solution
查看参考文献12篇
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文摘
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采用分光光度法对K_2FeO_4在初始pH=8.0～13.0的KOH溶液中的稳定性作了系统研究.研究发现,在恒定温度下,K_2FeO_4的稳定性受其浓度、溶液的碱度和其分解产物FeOOH的催化分解作用三方面影响.HO-离子浓度的增大将阻碍FeO2-4离子之间的碰撞,从而有利于增强K2FeO4的稳定性,但HO-离子浓度增大到一定程度后,K2FeO4的分解产物容易生成FeOOH,而FeOOH将催化K2EeO4的进一步分解.研究结果表明,0.5 mmol·L-1的K2Fe04在pH=10.0～11.0的KOH溶液中最稳定,其初始阶段分解过程为-级反应;溶液初始pH值不同,K2FeO4的稳定性随其浓度变化的规律亦不相同. |
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其他语种文摘
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The stability of K_2FeO_4 in dilute KOH solution with initial pH value from 8.0 to 13.0 was studied in detail by spectrophotometry method in this paper. The decomposition rate of aqueous solution of K_2FeO_4 is basically regulated by its concentration, pH and the decomposed product FeOOH that can catalyze the decomposition of K2Fe04. The increase of HO~ concentration can improve the stability of K_2FeO_4 by decreasing the collision frequency between FeO^" ions. However, when the concentration of HO" reaches a certain value, the decomposition product FeOOH is easily produced. K_2FeO_4 can catalyze the decomposition of K_2FeO_4. It was found that K_2FeO_4 is the most stable in the pH region of 10.0-11.0 and the decomposition rate of K_2FeO_4 is in the first order in the initial period. The decomposition rule of K_2FeO_4 along with its concentration in KOH solution is related with the initial pH of the solution. |
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来源
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化学学报
,2004,62(19):1951-1955 【核心库】
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关键词
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K_2FeO_4
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稳定性
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分光光度法
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地址
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浙江大学化学系, 杭州, 310027
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0567-7351 |
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学科
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化学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:1689494
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