An acid/base nwutralization will create a salt + water. If one uses water itself as the acid or base, and have an acid/base neutralization, how come that doesn't create a salt?
For example:$$ \ce{HCN(aq) + H2O(aq) <<=> H3O++ CN- ->[??] H3OCN}$$
Why doesn't that happen? What is keeping those conjugate bases and acids from forming a salt? And if there is something keeping these conjugate acids and bases from forming a salt, why doesn't it stop other acids and bases from forming salts? Like $$\ce{NH3 + HCl -> NH4++ Cl- + H3O++ OH- -> NH4Cl + 2H2O}$$
