When added to ice, salt first dissolves in the film of liquid water that is always present on the surface, thereby lowering its freezing point below the ices temperature. Ice in contact with salty water therefore melts, creating more liquid water, which dissolves more salt, thereby causing more ice to melt, and so on.

What type of reaction is salt on ice?

Actually, the chemical reaction is with salt and the thin layer of water around ice. The table salt dissolves into the water, and prevents the water from reforming into ice. Dissolution is a chemical reaction, albeit a reversible one when evaporation of water is considered.

Does any salt work on ice?

We can Verify: You can absolutely use table salt instead of specifically-branded ice melt salt. Table salt, rock salt, and salt made for ice are the same. … We wouldn’t recommend using all your table salt to melt the ice on your driveway because it’ll be much more expensive than buying a bag of $10 ice melt.