2021 Volume 45 Issue 3 Pages 292-297
The authors consider that the interest of students in chemical experiments is caused strongly by observing changes in chemical reactions. Three teaching materials for chemical reactions were treated as a microscale experiment. Firstly, a semipermeable membrane was apt to be broken according to the quality of the chemical substance. Secondly, the action of hydrogen ions, hydroxide ions and iodide ions were each recognized from a change of the aqueous solution by electrolysis of potassium nitrate and potassium iodide. Thirdly, the complex of copper and glycine was produced as a blue needle crystal on the copper plate by critical production condition, and was identified as cis-bis glycinato copper (II) by infrared spectroscopy.
