1. Heating: The solution is heated gently. This provides energy to the water molecules, causing them to gain kinetic energy and move faster.
2. Vaporization: As the water molecules gain enough energy, they overcome the attractive forces holding them in the liquid state and escape into the air as water vapor.
3. Crystallization: As water evaporates, the concentration of sodium chloride in the remaining solution increases. Eventually, the solution becomes saturated, meaning it can't hold any more dissolved salt. At this point, the sodium chloride starts to crystallize out of the solution as solid crystals.
4. Collection: The solid sodium chloride crystals can be collected and dried to remove any remaining traces of water.
Other methods:
* Distillation: This involves boiling the solution and collecting the water vapor separately, leaving the sodium chloride behind. This is more energy-intensive than evaporation.
* Solar evaporation: This is a less precise method, using the sun's heat to evaporate the water. It's suitable for large-scale salt production from seawater.
Important Note: The choice of method depends on the scale of the separation, the desired purity of the salt, and the available resources.
