盐和盐的反应是中学化学教材中的难点。几年来,本刊曾发表这方面的文章,同时也收到不少读者的来信,他们从不同角度指出已发表文章中的个别问题。对此,本刊表示感谢,并在本期的《读者信箱》内,刊登几位同志的意见和〈谈盐和盐的反应类型〉稿,供读者讨论。 The reaction of salt and salt is a difficulty in the middle school chemistry textbook. Over the past few years, this journal has published articles in this area and has also received letters from many readers. They point out individual issues in published articles from different perspectives. In this regard, the journal expressed gratitude, and in this issue of Reader’s Letterbox, the opinions of several comrades and the “types of reactions on salt and salt” were published for readers to discuss.