University Chemistry ›› 2021, Vol. 36 ›› Issue (6): 2006084.doi: 10.3866/PKU.DXHX202006084

• Future Chemist • Previous Articles     Next Articles

The Amazing Color of Chromium: Reaction of Cr(Ⅲ) with Hydrogen Peroxide

Jiaxuan Wu, Hantao Wen, Simin Wu, Yongtong Liang, Shaolong Tie(), Yue Li()   

  • Received:2020-06-29 Accepted:2020-07-20 Published:2020-09-28
  • Contact: Shaolong Tie,Yue Li E-mail:tiesl@scnu.edu.cn;yueli@m.scnu.edu.cn

Abstract:

Chromium and its compounds possess very diverse color and exhibit useful physical and chemical properties, which is introduced in inorganic chemistry. In this paper, the reaction between chromium (Ⅲ) and hydrogen peroxide is mainly discussed. With the change of pH, reactant concentration and temperature, the reaction mechanism will be different, which is mainly shown by the color alteration of the solution. The reaction between chromium (Ⅲ) and hydrogen peroxide is very interesting, because of its complex mechanism and rich colors, which could help students learn and understand the change of different valence states of chromium. In addition, the related practical application and interesting experiments are introduced.

Key words: Trivalent chromium, Hydrogen peroxide, Fun experiments

MSC2000: 

  • G64