How Impurities Prevent Liquid Freezing

Adding salt or other substances to water actually stops it from freezing at its normal temperature. These foreign particles physically block water molecules from forming the rigid, locked structure of ice.

When you add salt to ice, you create a chemical barrier that makes it harder for water molecules to bond into a solid crystal. This means the temperature must drop significantly lower before the liquid can successfully freeze. This scientific principle is exactly why we spread salt on roads during winter to prevent ice buildup. It is a brilliant example of how even a tiny amount of impurity can completely change a substance's physical behavior.