硝酸与金属的反应是一类典型的氧化还原反应,也是中学化学中重要的知识点,由此编制的有关计算题变化多端,隐蔽性强,其命题思路广,解题的灵活性高,对于培养和发展同学们的创造性思维能力有很大作用,是一类值得研究的题型。观察硝酸与金属反应的化学方程式,不难发现其有关计算包含了电子守恒、电荷守恒、原子守恒等多种守恒原理。 The reaction between nitric acid and metal is a kind of typical redox reaction, which is also an important knowledge point in middle school chemistry. Therefore, the compilation of relevant calculation questions has many changes and strong concealment, and its propositional thinking is wide and the flexibility of solving problems is high. To cultivate and develop students’ ability of creative thinking has a great effect, and it is a type of question that is worth studying. Observe the chemical equation of reaction between nitric acid and metal, it is not difficult to find that its calculation contains a variety of conservation principles of conservation of electrons, conservation of charge and conservation of atoms.