The properties of the individual components DO change.
* Salt: When salt dissolves in water, the strong ionic bonds holding the sodium (Na+) and chloride (Cl-) ions together break. These individual ions become surrounded by water molecules and disperse throughout the solution. This means the salt no longer exists as a solid crystal but as separate ions.
* Water: The water molecules become slightly oriented around the salt ions, changing the arrangement of the water molecules and influencing the properties of the solution. For example, the freezing point of the water will be lowered.
However, the overall properties of the mixture are different from either component alone.
* Saltwater: Saltwater is a homogenous mixture, meaning the salt and water are evenly distributed throughout. This means that saltwater has its own unique properties:
* It has a higher density than pure water.
* It has a higher boiling point than pure water.
* It conducts electricity (because of the free-moving ions).
In short: While the individual components of salt and water undergo changes, the resulting saltwater solution has its own distinct set of properties, different from either salt or water alone.