An Anions Ability to React with Water

Cl in an aqueous solution, for example, does not result in the production of any OH and does not affect the pH. Thus, Cl is always a spectator ion in acid-base chemistry. 

If HX is not one of the seven strong acids, it is a weak acid. In this case, the conjugate base X is a weak base and it reacts to a small extent with water to produce the weak acid and hydroxide ions  

The OH ion generated in this way increases the pH of the solution, making it basic. Acetate ion, for example, being the conjugate base of a weak acid, reacts with water to produce acetic acid and hydroxide ions, thereby increasing the pH of the solution  

What effect will NOs ions have on the pH of a solution What effect will ions have  

The situation is more complicated for salts containing anions that have ionizable protons, such as HS03. These salts are amphiprotic (Section 16.2), and how they behave in water is determined by the relative magnitudes of K and fCj, for the ion, as shown in Sample Exercise 16.19. If Ky, the ion causes the solution to be acidic. If Ky K , the Solution is made basic by the ion. 

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