ABSTRACT

In oxidations by nitric acid (HNO₃), such as the dissolution of gold (Au) in aqua regia, mixtures of nitrogen monoxide (NO) and nitrogen dioxide (NO₂) are produced. In this article, the exact processes through which these two nitrogen oxides are produced were discussed. It was shown that in the processes of dissolution in HNO₃ or aqua regia, NO₂ is never a direct product of oxidations by HNO₃. It was also explained that in such processes, NO₂ is always produced from HNO₃ and NO reacting. Further, the effect of the concentration of HNO₃ was discussed in light of thermodynamic calculations.

中文翻译：

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关于硝酸（HNO3）氧化过程中如何产生一氧化氮（NO）和二氧化氮（NO2）的研究

摘要

在硝酸（HNO ₃）氧化中，例如金（Au）在王水中的溶解，会生成一氧化氮（NO）和二氧化氮（NO ₂）的混合物。在本文中，讨论了生产这两种氮氧化物的确切过程。结果表明，在HNO ₃或王水的溶解过程中，NO ₂绝不是HNO ₃氧化的直接产物。还解释了在这样的过程中，NO ₂总是由HNO ₃和NO反应生成。此外，HNO ₃浓度的影响 根据热力学计算进行了讨论。