判断离子方程式的正误是化学考试中的常见内容,其正误的判断可根据书写离子方程式的几个标准加以考虑,看是否违背了这些原理或规则。1.客观性原理反应的生成物必须符合客观事实,这是书写化学方程式必须遵守的基本原则。如铁与稀盐酸反应,写成2Fe+6H+=2Fe3++3H2↑就错了,因为该? Judging the correctness of the ion equation is a common content in the chemistry exam. The judgment of its correctness and error can be considered according to several criteria for writing the ion equation to see if it violates these principles or rules. 1. Objectivity Principle The product of the reaction must conform to objective facts. This is the basic principle that must be followed in writing chemical equations. If iron reacts with dilute hydrochloric acid, it would be wrong to write 2Fe+6H+=2Fe3++3H2.