Abstract:

Chromium has a long history of application during the development of human society. Based on the various oxidation states of chromium and the characteristic colors of the chromium-containing compounds with different oxidation states, the problem 2 of the 54th International Chemistry Olympiad examined the oxidation changes of chromium and corresponding reactions, the relevant crystal phase structure, and its application in the ceramic glaze and catalytic polymerization.

Key words: Chromium, Spinel, Black ceramic glaze, Philips catalysts