[Lutetium]

Would it be correct to say that a salt does not dissolve in water well because the entropy change of the universe is not very positive/negative so that the reaction is not feasible?

[mjc123]

That's not an explanation, it's just saying the same thing in different words. Why is the entropy change what it is?
(And what do you mean by "the entropy change of the universe is not very positive/negative so that the reaction is not feasible". Do you mean that if the entropy change of the universe was very positive/negative the process would be feasible?)

[Babcock_Hall]

At the risk of possibly going off on a tangent, can you explain why you want to phrase things in terms of the universe, as opposed to the system?