How are the anions generated by hydrolysis?
Substances that are acidic, such as HNO3, HCl, and H2SO4, and others that are basic, such as NaOH and NH3. However, our recent discussions have indicated that ions can also exhibit acidic or basic properties. For example, we calculated Ka for NH4+ and Kb for F– in Sample Exercise 16.16. Such behavior implies that salt solutions can be acidic or basic. Before proceeding with further discussions of acids and bases, let's summarize some features of salts that should bring their acid and base properties into sharper focus.
We can assume that when salts dissolve in water, they are completely ionized; nearly all salts are strong electrolytes. Consequently, the acid-base properties of salt solutions are due to the behavior of their cations and anions. Many ions are able to react with water to generate H+(aq) or OH–(aq). This type of reaction is often called hydrolysis.
The anions, X–, derived from weak acids, HX, react
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