Growing Salt Crystals
|How Do We Grow Salt Crystals?
In a solution a solvent can only hold a certain amount of solute. This is called the solubility of a solution. In this experiment, the starting solution had reached its maximum solubility and was thus a saturated solution. However, as the temperature of the solution dropped, its solubility began to decrease and the solution couldn't hold the solute. As a result, the solution now became a supersaturated solution. The solution was forced to get rid of some of the solute and placed it on the nearest surface that could hold it. This was the thread that was submerged in the solution. As the temperature of the solution continued to drop and the volume of the solution also dropped as water evaporated from the solution, more salt accumulated on the thread forming the salt crystal.