对硫代硫酸分解产物单质硫沉淀过程的探究—

引用本文: 胡浩哲, 张浩宇, 芦昌盛. 对硫代硫酸分解产物单质硫沉淀过程的探究——意外的“失败”？[J]. 大学化学, 2025, 40(11): 409-415. doi: 10.12461/PKU.DXHX202412034 shu

Citation: Haozhe Hu, Haoyu Zhang, Changsheng Lu. Study on the Precipitation Process of Elemental Sulfur from the Decomposition Products of Thiosulfuric Acid: Is It an Unexpected Failed Experiment?[J]. University Chemistry, 2025, 40(11): 409-415. doi: 10.12461/PKU.DXHX202412034 shu

对硫代硫酸分解产物单质硫沉淀过程的探究——意外的“失败”？

南京大学化学化工学院, 南京 210023

通讯作者: 芦昌盛,E-mail:luchsh@nju.edu.cn

基金项目:
教育部化学“101计划”——基础化学实验课程建设项目；教育部第三批虚拟教研室建设点——“101计划”基础化学实验课程虚拟教研室；教育部实验教学和教学实验室建设研究项目(SYJX2024-076)

摘要: 在“硫代硫酸钠标准液的配制和标定”实验的操作过程中，大一新生因使用了未经稀释的硫代硫酸钠溶液意外在滴定环节产生大量淡黄色沉淀；学生们经过自主探究，重现了实验现象，调控体系pH ≈ 5时制备出较为稳定的硫胶体体系。通过课外文献调研、估算和分析，学生们推断沉淀成分并推测了硫单质的均相成核沉淀过程，提出可以使用硫胶体替代传统Fe(OH)₃胶体用于实验教学与课堂演示。

关键词:

English

Study on the Precipitation Process of Elemental Sulfur from the Decomposition Products of Thiosulfuric Acid: Is It an Unexpected Failed Experiment?

School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China

Corresponding author: Changsheng Lu, luchsh@nju.edu.cn

Received Date: 02 December 2024
Revised Date: 10 February 2025
Available Online: 17 February 2025

Abstract: During the experiment “Preparation and Calibration of Sodium Thiosulfate Standard Solution”, a significant amount of yellowish precipitation was unintentionally formed during the titration process by a freshman, due to the use of undiluted sodium thiosulfate solution. After conducting independent investigations, the students successfully reproduced the observed phenomenon and controlled the system’s pH to approximately 5, thereby preparing a relatively stable sulfur colloid system. Through additional literature research, estimation, and analysis, the students inferred the composition of the precipitate and hypothesized a homogeneous nucleation process for the precipitation of sulfur. Finally, based on their comparison, they recommended using sulfur colloid as a substitute for the traditional Fe(OH)₃ colloid in experimental teaching and classroom demonstrations.

Key words:

1. [1]
  南京大学大学化学实验教学组. 大学化学实验. 第3版. 北京: 高等教育出版社, 2018: 150.
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  LaMer, V. K.; Kenyon, A. S. J. Colloid Sci. 1947, 2 (2), 257.LaMer, V. K.; Kenyon, A. S. J. Colloid Sci. 1947, 2 (2), 257.
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  Steudel, R.; Göbel, T.; Holdt, G. Z. Naturforsch. B 1988, 43 (2), 203.Steudel, R.; Göbel, T.; Holdt, G. Z. Naturforsch. B 1988, 43 (2), 203.
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  Kerker, M.; Daby, E.; Cohen, G. L.; Kratohvil, J. P.; Matijevic, E. J. Phy. Chem. 1963, 67 (10), 2105.Kerker, M.; Daby, E.; Cohen, G. L.; Kratohvil, J. P.; Matijevic, E. J. Phy. Chem. 1963, 67 (10), 2105.
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  Boulegue, J. Phosphorus Sulfur 1978, 5 (1), 127.Boulegue, J. Phosphorus Sulfur 1978, 5 (1), 127.
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  Wu, K. J.; Edmund, C. M.; Shang, C. X.; Guo, Z. X. Prog. Mater. Sci. 2022, 123, 100821.Wu, K. J.; Edmund, C. M.; Shang, C. X.; Guo, Z. X. Prog. Mater. Sci. 2022, 123, 100821.
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对硫代硫酸分解产物单质硫沉淀过程的探究——意外的“失败”？

通讯作者: 芦昌盛,E-mail:luchsh@nju.edu.cn

English

Study on the Precipitation Process of Elemental Sulfur from the Decomposition Products of Thiosulfuric Acid: Is It an Unexpected Failed Experiment?

Corresponding author: Changsheng Lu, luchsh@nju.edu.cn

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

对硫代硫酸分解产物单质硫沉淀过程的探究——意外的“失败”？

通讯作者: 芦昌盛,E-mail:luchsh@nju.edu.cn

English

Study on the Precipitation Process of Elemental Sulfur from the Decomposition Products of Thiosulfuric Acid: Is It an Unexpected Failed Experiment?

Corresponding author: Changsheng Lu, luchsh@nju.edu.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

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