University Chemistry ›› 2021, Vol. 36 ›› Issue (8): 2009064.doi: 10.3866/PKU.DXHX202009064

• Chemistry Laboratory • Previous Articles     Next Articles

Study about the Composition and Stability Constant of Sulfosalicylic Acid-Copper(Ⅱ) Complex by Mole Ratio Method

Min Peng, Jianxin Shi(), Zhou Wang, Lianyun Li   

  • Received:2020-09-28 Accepted:2020-11-12 Published:2020-12-22
  • Contact: Jianxin Shi
  • Supported by:


The feasibility of using the mole-ratio method for study of the formation and stability constant of sulfosalicylic acid-copper(Ⅱ) complex was explored. The experimental result revealed that the chelate-to-copper ratio was 1:1 at pH = 5, and its absolute stability constant was found to be lgK = 9.63, which was close to the value 9.52 from the handbook.

Key words: Mole ratio method, Sulfosalicylic acid-copper(Ⅱ) complex, Stability constant


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