Essay On Salt Water

People have been using salt since 6050 bc.We have used it for seasoning, preservation, and in the last century for lowering the freezing point of water(History of Salt). In pure water 0 degrees celsius is the normal freezing point of water. Ice will melt just as fast the water will freeze. You won't see the melting and freezing processes as long as they are balanced and equal. Adding salt or any foreign substance to the water upsets the fragile equality between freezing and melting. Less of the water molecules reach the surface of the ice in an amount of given time. The melting rate isn't changed by the salt, so melting is going to happen faster than the freezing. This makes the ice melt(Frederick A. Senese, Why can adding salt to ice water make the ice melt slower?).
If the ice and water mixture is cooled, the molecules move slower.The slower molecules are more easily captured by the ice, and then freezing rate occurs at a greater rate than
As the solution begins to freeze out of the salt water the fraction of water in the solution becomes lower and the freezing point of the solution drops further.This doesn't continue, because eventually the solution will become saturated with salt. The lowest possible temperature for the salt solution is -21.1 degrees celsius. “At that temperature, the salt in the solution begins to crystallize along with the ice, until the solution completely freezes. The frozen solution is a mixture of separate crystals and ice crystals, this is not a homogeneous mixture of salt and water.” This mixture is called a eutectic mixture (Frederick A. Senese,Why does salt melt ice?). If salt is added to the water, the Na negative and Ci positive ions attract to the water molecules and interfere with the formation of the large solid known as ice. of you want to achieve a solid, the solution must be cooled to an even lower