Chemistry
Why does salt make ice melt faster?
Quick fact
Adding salt to ice causes a phase change, melting the ice and creating a brine solution.
Why this is interesting
Have you ever noticed how salt makes icy sidewalks less slippery?
Read the full explanation
Understanding Why does salt make ice melt faster?
Salt disrupts the formation of ice crystals by lowering the freezing point of water.
A deeper explanation
When salt (sodium chloride) is added to ice, it dissolves in the thin layer of liquid water on the surface, reducing its freezing point. This process, called freezing point depression, causes more water to melt and prevents new ice from forming.