How can salt make ice colder and melt it?

Answer 1

Adding salt to ice water does make it colder. It lowers the freezing point of the water making the mixture colder. The ice will melt more slowly because the water's freezing and melting points have been depressed by the addition of the solvent salt.

Answer 2

why does adding salt to water make it colder? The salt is not actually making the ice colder. The internal portions of the ice are already below 0 degrees Celsius. The salt, or NaCl, gets in the way of the intermolecular forces of the water, allowing the ice to melt at lower temperatures and remain in the water phase below 0. In other words, the water molecules are normally rigid enough to freeze at 0 degrees, but the addition of salt makes it more difficult for them to be rigid enough. This lowers the melting point. As the internal portions of the ice are already below 0, when the external ice is melted below 0 also, the internal, very cold portions, can further cool the water/ice mixture.

Answer 3

Salt lowers the freezing point of water, which means water can exist as a liquid at a colder temperature than 0 degrees Celsius. This colligative property makes possible the salting of roads up north so they don't freeze as easily, as well as churning home-made ice cream!

Answer 4

Because of its chemicals

Another Answer

Salt does not make ice 'colder'; salt melts ice by reducing its freezing point based on the mixture of salts with the ice/ water.

Answer 5

salts absorb heat, that why the water become colder as it undergo endothermic reaction.

Answer 6

Any kind of salt will make some of the ice melt, and decrease the net temperature of the solute.

Answer 7

Adding salt to water creates a solution that has a lower freezing temperature than the ice cream mixture, bringing the temperature of the ice cream below its freezing point

Answer 8

yes the freezing point will lower!

Answer 9

See link.