# What is the driving force of this reaction?

I know that every reaction that occurs in a solution must have a driving force leading to the kicking out of some ions from the solution. These reactions include redox , double-displacements and acid/base. Now my question is if i react aqueous ammonia with aqueous hydrochloric acid what will be the driving force of this reaction?

I know that ammonium chloride is formed, but this salt is soluble in water so exists as aqueous ions. But for reactions in solutions some ions have to be removed, as a result creating a driving force for the reaction. Like in the case of Arrhenius acid-base reactions, the formation of liquid water is the driving force of the reaction.

Suppose that you have 1 mole of hydronium ions(the counteranion of ammonium cations) and you add 1 mole of hydronium ions(countercation of chloride anions). Nearly all of them will react, resulting in formation of 2 moles of water, which has negligible for the sake of this question dissociation constant $$K_w=10^{-14}$$. So all the mentioned ions disappear.