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本文研究了一元弱酸在水中的电离情况．根据物料衡算和近似计算，得到弱酸电离度与Ｋａ的关系式，由此得到：极弱的酸在无限稀释时，不能完全电离．
In this paper, the ionization of monovalent weak acids in water has been studied. According to the calculation of the material and the approximate calculation, we get the relationship between weak acidity and Ka, we can get: Weak acid can not be fully ionized in infinite dilution.