## Chemistry: Atoms First (2nd Edition)

If we have some acid, $HA$, with $K_a$ greater than $H_3O^+$, this reaction will completely occur: $HA(aq) + H_2O(l) -- \gt A^-(aq) + H_3O^+(aq)$ The same thing would happen for a base with $K_b$ greater than the $OH^-$. If the reaction completely occurs, the compound will no longer exist in water.