化学平衡状态的判断是化学平衡中的一个难点。从化学平衡状态的概念可知,在一定条件下,一个可逆反应是否达到平衡状态,主要根据两点:一是根据化学平衡状态的本质特征——正反应速率与逆反应速率相等(v_正=v_逆);二是根据化学平衡状态的宏观表现——各组分的浓度保持不变。实际应用中常常遇到多种不同的可逆反应,不同的已知条件。而资料中,几乎都是先通过对反应分类,再 The judgment of the chemical equilibrium state is a difficult point in the chemical equilibrium. According to the concept of chemical equilibrium state, under certain conditions, whether a reversible reaction reaches the equilibrium state is mainly based on two points. First, according to the essential characteristics of the chemical equilibrium state, the positive reaction rate and the reverse reaction rate are equal (v_ = v = _ Inverse); second is based on the macro-performance of the chemical equilibrium state - the concentration of each component remains unchanged. In practice, often encountered a variety of different reversible reaction, different known conditions. The data, almost all through the first reaction classification, and then