* Dissolving: Salt (sodium chloride) and vinegar (acetic acid) dissolve in water. This means the molecules of salt and vinegar are surrounded by water molecules, but their chemical structure remains unchanged.

* No New Compounds: No new substances are formed. You still have salt, vinegar, and water, just mixed together.

Can you get the salt and vinegar back?

* Yes, you can mostly get them back. You can evaporate the water, leaving behind the salt and vinegar. The vinegar will evaporate as well, but you can recover it through distillation (boiling and condensing).

* Crystallization: You can get salt crystals back by evaporating the water. The salt will precipitate out as the water evaporates. However, the vinegar won't crystallize easily.

Key Difference:

* Chemical reaction: Creates new substances with different chemical structures (e.g., burning wood produces ash, carbon dioxide, and water).

* Physical change: Changes the form or appearance of a substance but not its chemical makeup (e.g., melting ice is a physical change, water is still H₂O).

In short: Mixing salt and vinegar with water is a physical change that can be reversed.