“水溶液中的离子平衡”是高中化学教学重点与难点,而关于“水电离出的H+浓度”的判断是教学难点,在高考试题中占有一定的比例.而学生学习的时候常常容易混淆,本文就水电离出的氢离子浓度判断提供一些规律技巧,旨在为高中化学教学提供一定的参考与指导. “Ion balance in aqueous solution ” is the emphasis and difficulty of high school chemistry teaching, and “on the water out of the H concentration ” judgment is difficult to teach, occupy a certain proportion of the entrance examination questions, and students often learn Easy to be confused, this article provides some regular skills for judging the concentration of hydrogen ions leaving water and aims to provide some reference and guidance for high school chemistry teaching.