PH
Weak acids and bases

C stands for analytical concentration. In some texts, one mass balance equation is replaced by an equation of charge balance. This is satisfactory for simple cases like this one, but is more difficult to apply to more complicated cases as those below. Together with the equation defining K, there are now three equations in three unknowns. When an acid is dissolved in water C = C = C, the concentration of the acid, so =. After some further algebraic manipulation an equation in the hydrogen ion concentration may be obtained.
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