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酸碱平衡是一个复杂的平衡体系,当酸或碱的浓度极稀或其强度极弱时,水本身的质子自递反应就不能忽略,这就需要解一元三次方程式。
Acid-base balance is a complex equilibrium system. When the concentration of acid or alkali is very dilute or its intensity is extremely weak, the proton self-reliance on water can not be neglected. This needs to be solved by the cubic equation.