论文部分内容阅读
离子方程式揭示了化学反应的实质,它是化学上的重要工具知识。因此,让学生熟练正确地书写离子方程式,这对化学的学习和计算,都具有十分重要的作用。本文想着重就学生在书写离子方程式中容易出现的一些错误和在教学中应该注意的一些问题,作粗浅的探讨。一、书写离子方程式的基础让学生能正确熟练地书写化学方程式和掌握电解质的电离知识是书写离子方程式的基础。二、离子反应发生的条件在中学化学里,离子反应主要是两种类型,一是离子互换反应,一是有离子参加的置换反应,前者属于复反解反应,后者属于氧化还原反应。学生不难掌握离子互换夏应
The ion equation reveals the essence of the chemical reaction, which is an important chemical tool knowledge. Therefore, it is important for students to write the ion equations skillfully and correctly, which is of great importance for the study and calculation of chemistry. This article wants to focus on some of the errors that students are likely to make in writing ion equations and some of the issues that should be noted in teaching. First, writing the foundation of the ion equation allows students to correctly and skillfully write chemical equations and master the ionization knowledge of electrolytes. This is the basis for writing ion equations. Second, the ion reaction occurs in the conditions of high school chemistry, the ion reaction is mainly two types, one is the ion exchange reaction, one is the ion to participate in the replacement reaction, the former belongs to complex reverse reaction, the latter belong to the redox reaction. Students are not difficult to master ion exchange summer