Home

Citation: Tiejun Su. The Construction and Application of the Calculation Formula for Endpoint Error in Precipitation Titration: A Case Study of the Mohr Method[J]. University Chemistry, ;2024, 39(11): 384-387. doi: 10.12461/PKU.DXHX202402039 shu

The Construction and Application of the Calculation Formula for Endpoint Error in Precipitation Titration: A Case Study of the Mohr Method

Tiejun Su ^1,2

1.
College of Medicine and Health Science, Jingzhou University, Jingzhou 434020, Hubei Province, China;
2.
Virtual Teaching and Research Section of Analytical Chemistry Course, Ministry of Education, Changsha 410082, China

Received Date: 20 February 2024
Revised Date: 6 May 2024

Endpoint error is an important topic in analytical chemistry education. Based on the theory of precipitation-dissolution equilibrium and the definition of endpoint error, a general formula for calculating the endpoint error in the Mohr method has been derived. The application of this formula in directly calculating the endpoint error, determining the titration jump range, and determining the minimum required amount of indicator is introduced, and the calculated results are consistent with the literature values. The construction of this formula further improves the new methodological system for calculating endpoint errors, which will effectively promote the development of first-class courses in analytical chemistry.
- Precipitation titration,
- Endpoint error,
- Titration jump,
- Indicator
1. [1]
  Ringbom, A. Complexation in Analytical Chemistry:A Guide for the Critical Selection of Analytical Methods Basedon Complexation Reactions; Interscience Publisher:New York, NY, USA,1963; pp. 182-185.
2. [2]
3. [3]
4. [4]
5. [5]
6. [6]
7. [7]
8. [8]
9. [9]
10. [10]
11. [11]
12. [12]
1. [1]
  Limin Shao , Na Li . A Unified Equation Derived from the Charge Balance Equation for Constructing Acid-Base Titration Curve and Calculating Endpoint Error. University Chemistry, 2024, 39(11): 365-373. doi: 10.3866/PKU.DXHX202401086
2. [2]
  Na Li , Limin Shao . Deduction of the General Formula of the Inverse Function of the Titration Curve. University Chemistry, 2025, 40(3): 390-401. doi: 10.12461/PKU.DXHX202409134
3. [3]
  Wenhui Li , Changshuo Zhu , Xinyu Cui , Chenfei Zhao , Lina Qiu , Yan Li , Chuandong Wu , Min Yang , Yuan Zhuang . Visual Determination of Acid-Base Titration Endpoints Using Smartphone APP-Based Analysis. University Chemistry, 2025, 40(7): 328-335. doi: 10.12461/PKU.DXHX202409062
4. [4]
  Lei Shu , Zimin Duan , Yushen Kang , Zijian Zhao , Hong Wang , Lihua Zhu , Hui Xiong , Nan Wang . An Exploration of the CO₂-Involved Carbon Cycle World. University Chemistry, 2024, 39(5): 144-153. doi: 10.3866/PKU.DXHX202309084
5. [5]
  Yi Li , Zhaoxiang Cao , Peng Liu , Xia Wu , Dongju Zhang . Revealing the Coloration and Color Change Mechanisms of the Eriochrome Black T Indicator through Computational Chemistry and UV-Visible Absorption Spectroscopy. University Chemistry, 2025, 40(3): 132-139. doi: 10.12461/PKU.DXHX202405154
6. [6]
  Qingyu Shi , Yiqing Wang , Ziqian Su , Danzan Fu , Jiajun Qin , Yuetong Liu , Yongce Zhang , Yan Su . AI Titration Analysis Experiment Based on Computer Vision. University Chemistry, 2026, 41(1): 57-63. doi: 10.12461/PKU.DXHX202505001
7. [7]
  Jiaqi Chen , Liang Chen , Xiaocui Wei , Yankai Wang , Yahui Chang , Xinghao Ji , Haoyu Yang , Yue Sun , Yawen Wang , Xiufeng Shi , Xu Wu . Digital Empowerment for Foundational Excellence: A Digitally Enhanced Coordination Titration Experiment of Heating Pack Component Analysis. University Chemistry, 2026, 41(1): 382-393. doi: 10.12461/PKU.DXHX202506008
8. [8]
  Hui Shi , Shuangyan Huan , Yuzhi Wang . Ideological and Political Design of Potassium Permanganate Oxidation-Reduction Titration Experiment. University Chemistry, 2024, 39(2): 175-180. doi: 10.3866/PKU.DXHX202308042
9. [9]
  Lei Qin , Kai Guo . Application of Generative Artificial Intelligence in the Simulation of Acid-Base Titration Images. University Chemistry, 2025, 40(9): 11-18. doi: 10.12461/PKU.DXHX202408123
10. [10]
  Yuejiao Wang , Quanxing Mao , Junshuo Cui , Xiaogeng Feng , Xiaohong Chang , Zhenning Lou , Ying Xiong . 颜色识别式人工智能融入混合碱滴定实验的应用. University Chemistry, 2026, 41(1): 107-113. doi: 10.12461/PKU.DXHX202506020
11. [11]
  Fangyan Zhang , Yuhan Li , Bowen He , Meng Lin , Ying Ma . Determination of Sodium Carbonate Content: A Conductometric Titration Approach. University Chemistry, 2026, 41(3): 373-380. doi: 10.12461/PKU.DXHX202505023
12. [12]
  Xu Long , Shuan Zhang , Qinghua Meng , Xiaorong Li . Practice of Ideological and Political Education in Analytical Chemistry from the Perspective of New Medicine: Redox Titration. University Chemistry, 2025, 40(11): 108-114. doi: 10.12461/PKU.DXHX202412025
13. [13]
  Tingting Jiang , Jing Chang . Application of Ideological and Political Education in Chemical Analysis Experiment under the Background of Emerging Engineering Education: Taking the Redox Titration Experiment as an Example. University Chemistry, 2024, 39(2): 168-174. doi: 10.3866/PKU.DXHX202308007
14. [14]
  Juan Hou , Chen Zhou , Jing Sun . Teaching Design of the Classical Analytical Chemistry Content Based on Logical and Innovative Thinking: A Case Study of the Application of Acid-Base Titration Method. University Chemistry, 2024, 39(4): 221-226. doi: 10.3866/PKU.DXHX202310023
15. [15]
  Ming Li , Zhaoyin Li , Mengzhu Liu , Shaoxiang Luo . Unveiling the Artistry of Mordant Dyeing: The Coordination Chemistry Beneath. University Chemistry, 2024, 39(5): 258-265. doi: 10.3866/PKU.DXHX202311085
16. [16]
  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?. University Chemistry, 2025, 40(11): 409-415. doi: 10.12461/PKU.DXHX202412034
17. [17]
  Siyu HOU , Weiyao LI , Jiadong LIU , Fei WANG , Wensi LIU , Jing YANG , Ying ZHANG . Preparation and catalytic performance of magnetic nano iron oxide by oxidation co-precipitation method. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1577-1582. doi: 10.11862/CJIC.20230469
18. [18]
  Yuting ZHANG , Zunyi LIU , Ning LI , Dongqiang ZHANG , Shiling ZHAO , Yu ZHAO . Nickel vanadate anode material with high specific surface area through improved co-precipitation method: Preparation and electrochemical properties. Chinese Journal of Inorganic Chemistry, 2024, 40(11): 2163-2174. doi: 10.11862/CJIC.20240204
19. [19]
  Ling Li , Guocheng Wang . 知识图谱与AI助教在无机化学混合式教学中的初步探索——以“沉淀溶解平衡”的教学为例. University Chemistry, 2025, 40(6): 1-8. doi: 10.12461/PKU.DXHX202407063
20. [20]
  Xuexia He , Zhibin Lei , Pei Chen , Qi Li , Weiyu Deng , Peng Hu . 以“溶度积规则”指导电荷转移共晶沉淀析出——材料类专业无机化学教学改革案例. University Chemistry, 2025, 40(8): 1-10. doi: 10.12461/PKU.DXHX202410099

Get Citation

PDF

XML

Metrics

PDF Downloads(10)
Abstract views(2377)
HTML views(566)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return