Demonstration of the Indium Oxide Conversion to Indium Metal

To demonstrate the chemical reactions in colorless solutions, the transition of solid indium oxide into metallic indium through the solution phase was chosen. A demonstration describes using In2O3 as the starting material and an acid solution as the dissolving medium. In addition, the reaction of metal deposition by cementation is shown. This demonstration helps develop chemical thinking in students and engages schoolchildren and first-year college students in chemistry. The resulting indium can be used in other experiments. In addition, we obtained clean, marketable metals in this demonstration.