In a sour alkali () solution, need (or at least need to join many alkali (acid) to make this solution is a neutral or alkali (acid)? Further consideration: how exactly to join the solution to alkali (acid) the pH value of the required? These are the common practice to solve problems. According to the traditional approach, if the corresponding calculation often too multifarious (especially for complex acid system). This paper, through the introduction of a new parameters (grant will they called it "(soda acid) capacity" and "acid alkali) capacity coefficient (", can make such problems greatly simplified.
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