离子反应和离子方程式是新编高中化学教材中的重点章节,也是教学的难点。学生在书写离子方程式时易发生错误。本文结合教学实际,归纳出学生书写离子方程式的十类错例,以便在教学中予以注意。一、不熟悉物质的溶解性而出现错误例如:(1)硫化亚铁和稀硫酸反应制硫化氢S2-+2H+=H2S Ion reaction and ion equations are the key chapters in the new high school chemistry textbooks, and they are also difficult to teach. Students are prone to errors when writing ion equations. This article combines the actual teaching, summed up the students written ten ion equations in order to be noted in teaching. First, it is not familiar with the solubility of the substance and errors occur. For example: (1) Reaction between ferrous sulfide and dilute sulfuric acid to produce hydrogen sulfide S2-+2H+=H2S