University Chemistry ›› 2021, Vol. 36 ›› Issue (12): 2101007.doi: 10.3866/PKU.DXHX202101007

• Chemistry Laboratory • Previous Articles     Next Articles

Determination of Ion Transference Number by Electromotive Forces Method

Dekun Meng, Nan Zhou, Shiquan Lin, Aiqiu Zhou, Meng Lin(), Shuyong Zhang   

  • Received:2021-01-05 Accepted:2021-02-22 Published:2021-02-22
  • Contact: Meng Lin


Ion transference number is an important parameter of physical chemistry, and its measurement is the basic content in physical chemistry laboratory. Based on the measurement of ion transference number in "Basic Physical Chemistry Laboratory", combined with measurements of the electromotive force, a new experiment was designed for measuring the transference number of copper ion and sulfate ion in solution, and the ion transference numbers obtained are basically consistent with the values in the literature. We attempt to use the laboratory skills that college students already mastered in physical chemistry laboratory and integrate the knowledge of electrochemistry to design and explore a new method for measuring ion transference by the electromotive force method. The students' comprehensive ability can be improved to solve problems.

Key words: Ion transference number, Electromotive force method, Semi-permeable membrane