引用本文:
刘绍乾, 方正法, 杨章鸿, 董和大, 黄思. 磺基水杨酸合铜配合物组成和稳定常数测定实验的改进[J]. 大学化学,
2018, 33(3): 59-62.
doi:
10.3866/PKU.DXHX201709038
Citation: LIU Shaoqian, FANG Zhengfa, YANG Zhanghong, DONG Heda, HUANG Si. Improvement of Stability Constant Determination of Sulfosalicylic Acid-Copper (Ⅱ) Complex[J]. University Chemistry, 2018, 33(3): 59-62. doi: 10.3866/PKU.DXHX201709038
Citation: LIU Shaoqian, FANG Zhengfa, YANG Zhanghong, DONG Heda, HUANG Si. Improvement of Stability Constant Determination of Sulfosalicylic Acid-Copper (Ⅱ) Complex[J]. University Chemistry, 2018, 33(3): 59-62. doi: 10.3866/PKU.DXHX201709038
磺基水杨酸合铜配合物组成和稳定常数测定实验的改进
English
Improvement of Stability Constant Determination of Sulfosalicylic Acid-Copper (Ⅱ) Complex
Abstract:
A method to improve the determination of composition and stability constant of sulfosalicylic acid-copper(Ⅱ) complex, a common experiment in university laboratory course, was proposed. In this study, a mixed solution of sulfosalicylic acid and sodium hydroxide was prepared in advance. The hexamethylene tetramine-nitric acid buffer solution was used to control the pH, which avoided repeatedly adjustment of the pH with a strong acid and a strong base and simplified the experiment process. At pH 5.60, the measured conditional stability constant was 3.6×103 and the deduced stability constant was 3.6×109, which was roughly consistent with the reported value (3.3×109).
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