University Chemistry ›› 2021, Vol. 36 ›› Issue (9): 2105013.doi: 10.3866/PKU.DXHX202105013

Special Issue: 分析化学课程与实验教学

• Between Teacher and Student • Previous Articles     Next Articles

Derivation of Proton Balance Equations for Complex System in Acid-Base Solution: Taking FeCl3 as an Example

Jiarui Xu1,2, Xiaowen Xu1, Guizheng Zou1, Bin Zhang1,*()   

  1. 1 School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
    2 Taishan College, Shandong University, Jinan 250100, China
  • Received:2021-05-06 Accepted:2021-06-03 Published:2021-06-07
  • Contact: Bin Zhang


For complex acid-base solution system, it is difficult to deal with the proton equilibrium condition and deduce its proton balance equation (PBE). In this paper, taking FeCl3 aqueous solution as a model, we discuss the treatment for proton equilibrium condition, and deduce systematically the proton balance equations based on various equilibrium relations in acid-base solution. These derivation results of PBE have been verified by different methods.

Key words: Analytical chemistry, Acid-base equilibrium, Proton balance equation, Mathematical derivation, FeCl3


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