it dissolve in the water
You get salt water.
it becomes salt water
salt
the water evaporates and then it leaves the salt behind
You get a mixture of salt and sand. Nothing more happens.
The salt dissolves in the water
You create a solution of the salt in water.
Nothing happens.
Salt is not evaporated !
You get a salt solution.
it's becomes a salt water
Salt remain as a residue.