In this chapter we introduce a variety of graphical displays of monoprotic acid—base equilibria. Although a number of diagrammatic methods for solving pH problems has been proposed, none is as fast as numerical approximation using equations (3-2)−(3-5), for those who are experienced in chemistry. For the student, however, these diagrams can help develop the experience needed to make correct approximations suitable under various conditions. First, we present a complete ratio diagram since it is the simplest to use and the most foolproof to interpret. The log α and log C diagrams shown next are either more complicated (log α) or less foolproof, requiring estimations as to the approximate equalities or intersections to look for (log C).
KeywordsIonic Strength Material Balance System Point Equilibrium Ratio Pure Acid
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