金属与硝酸的水溶液体系的产物 M(NO_3)_n、H_2O、NH_4NO_3、NO_2、NO、N_2、H_2均是氧化还原反应的产物。从体系的反应历程可知,M(NO_3)_n 和 H_2是硝酸与金属作用的直接产物;NO_2、NO、N_2是 NO_3~-逐级被还原的产物。这样体系的气相中可以看成只有两个分压。一个是氢气的分压,一个是氮的化合物的分压(pNO_2+pNO+pN_2)。这样就可以从简地 The products M (NO_3) _n, H_2O, NH_4NO_3, NO_2, NO, N_2, H_2 of the aqueous solution system of metal and nitric acid are the products of redox reaction. According to the reaction process of the system, M (NO_3) _n and H_2 are the direct products of the interaction between nitric acid and metal; NO_2, NO and N_2 are the products of NO_3 ~ - reduction step by step. The gas phase in this system can be seen as only two partial pressures. One is the partial pressure of hydrogen and the other is the partial pressure of the nitrogen compound (pNO 2 + pNO + pN 2). This can be simplified