Salt is the solute (the substance being dissolved) and water is the solvent (the substance doing the dissolving.
Chemically, they are both H20. One is in liquid state, one is in vapor state, but there is no chemical change there.
Evaporation
Yes,of course it is!It leaves behind salt minerals and other stuff and only water will evaporate.
Boil the water out of the solution the water will evaporate and the solid;salt will remain at the bottom but still soggy.