Abstract “Passivation of iron in concentrated nitric acid solution” is familiar knowledge of elemental compounds, but the yellow solution after the reaction has received less attention and discussion. The experimental results show that the interaction of various substances causes the yellow solution, such as unreacted concentrated nitric acid, Fe3+ and NO2, as well as the possible nitrogen compounds products in the reaction. After that, a reasonable explanation is presented on the colorless solution formed by aluminum passivation in concentrated nitric acid.
WEN Li-Quan, ZUO Jing-Ping, LI Yue. Exploring the Causes of Yellow Solution After the Reaction Between Iron and Concentrated Nitric Acid[J]. Chinese Journal of Chemical Education, 2024, 45(21): 108-112.
