1978 Volume 42 Issue 1 Pages 13-18
The effects of temperature on the electrophoretic behaviour of Co (II), Cu (II), Fe (III), and Ni (II) complex ions in hydrochloric acid solutions were investigated by column electrophoresis with silica gel powder as support medium. Electrophoretic velocity of the complex ion was determined by measuring the center position of the migrating zone.
With increasing temperature from 3°C to 82°C, for Co (II), Cu (II), and Fe (III) complex ions, the zone first migrates towards the cathode, and then reverses towards the anode for the intermediate hydrochloric acid concentration. For Ni (II) complex ion migration is always towards the cathode in the range of temperature and hydrochloric acid concentration studied.
These results can be explained by the predominant formation of higher chloro-complexes at higher temperatures.