物理化学学报 >> 1985, Vol. 1 >> Issue (06): 579-585.doi: 10.3866/PKU.WHXB19850613

研究简报 上一篇    

隔膜电解法测定离子水化数

程鹏里   

  1. 郑州大学化学系
  • 收稿日期:1984-12-03 修回日期:1985-06-21 发布日期:1985-12-15
  • 通讯作者: 程鹏里

DETERMINATION OF IONIC HYDRATION NUMBERS BY THE MEMBRANE ELECTROLYSIS METHOD

Cheng Pengli   

  1. Department of Chemistry, Zhengzhou University
  • Received:1984-12-03 Revised:1985-06-21 Published:1985-12-15
  • Contact: Cheng Pengli

Abstract: This paper suggests a method for the determination of the ionic hydration num- bers, The method is based on the selectivity of the ion exchange membrane for ion to pass through.Only one kind of ions—anions or cations is allowed to get across the membrane, when an ion exchange membrane is used as an electrolysis membrane.
Three factors causing the volume change of solution in electrode compartment are counted here: (1) the transference of water which are carried by transferring ions, (2)the transference of ions, (3) the electrode reaction. By means of the measured volume change of solution in the anode or cathode compartment, minus the volume change caused by the latter two factors, the transferring volume of water can be obtained, then the transferring mole numbers of water can be calculated. The transferring mole numbers of ions can be calculated from the neasurement of quantities of electricity. The transferring mole numbers of water were divided by the transferring mole numbers of ions, that is the ionic hydration number.
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