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Citation: Sijia Xiang, Guangxu Liao, Qizhi Yao, Gu Jin, Lingling Li. 高锰酸钾法测定白云石中钙的影响机制探究[J]. University Chemistry, ;2021, 36(9): 201205. doi: 10.3866/PKU.DXHX202012053 shu

高锰酸钾法测定白云石中钙的影响机制探究

1.
School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China;
2.
National Demonstration Center for Experimental Chemistry Education(University of Science and Technology of China), Hefei 230026, China

Corresponding author: Qizhi Yao, qzyao@ustc.edu.cn
Received Date: 31 December 2020

“白云石中钙含量测定”是大学分析化学实验中重要的实验内容之一，学生在进行该实验时发现，用草酸钠标准溶液标定高锰酸钾溶液和用标定过的高锰酸钾溶液滴定由白云石转化形成的草酸钙时，其起始氧化还原反应速度存在明显的差异。针对这些实验现象，结合理论知识，提出了几点猜想，并指导学生设计实验进行探究和验证。通过这些实验探究，不仅解答了学生的疑惑，更重要的是培养和提高了他们分析和解决问题的能力，激发了学生对化学实验学习的兴趣。
- Potassium permanganate method,
- Redox reaction,
- Calcium oxalate,
- Influence factors,
- Titration rate
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