The dissociation constant of weak acid is 1 $ \times $ 10$-$4. In order to prepare a buffer solution with a pH = 5, the [Salt]/[Acid] ratio should be

Question

The dissociation constant of weak acid is 1 $ \times $ 10^$-$4. In order to prepare a buffer solution with a pH = 5, the [Salt]/[Acid] ratio should be

4 : 5