初中化学最后讲到了各物质相互转化关系,这是对前边所学知识的系统性总结和归纳。在提到酸与盐反应生成新酸和新盐时,教师总要强调指出:弱酸不与强酸盐作用。对于初学化学同学来说,这样强调是必要的。否则,学生死搬硬套,会写出一些实际上不能进行的反应。进入高中以后,随着知识面的扩大,特别是通过氧化还 Junior middle school chemistry finally talked about the mutual transformation of various substances. This is a systematic summary and induction of the knowledge learned in the front. When referring to the reaction between acid and salt to generate new acid and new salt, teachers always emphasized that weak acid does not react with strong acid salt. For beginner chemistry classmates, this emphasis is necessary. Otherwise, the students will not be able to carry out a response and will actually write something that they can’t actually do. After entering high school, with the expansion of knowledge, especially through oxidation