# How does salt affect pH?

Feb 9, 2017

Does the anion or cation undergo hydrolysis?

#### Explanation:

Salts of weak acids, such as fluorides will give rise to a slightly basic solution:

$N a F \left(a q\right) + {H}_{2} O r i g h t \le f t h a r p \infty n s N {a}^{+} + H F \left(a q\right) + H {O}^{-}$

For another example, look at the acid-base behaviour of ammonium salts:

$N {H}_{4}^{+} + {H}_{2} O \left(l\right) r i g h t \le f t h a r p \infty n s N {H}_{3} \left(a q\right) + {H}_{3} {O}^{+}$

In each case, the equilibrium lies to the left as we face the equation, but the equilibrium still operates, and is certainly quantifiable.