Why does the presence of salt lower the freezing point of water?
When Salt is added to Water, the salt mixes with water and a chemical bonding takes place. Resultantly, an ionic bond forms between Salt and Water, which results in a substance that is ionically bonded. Under normal conditions, ordinary water freezes at 0°C, or 32°F. However, if you add salt to water, its freezing point becomes lower. Salt water solution has a freezing point below zero and you can use this fact to make ice cream! The higher the quantity of salt, the lower the freezing point. One molar solution of salt (that’s about 58.5g in 1 litre of water) will freeze at about -3.4o Celsius. For in-depth understanding, visit the web page: http://www.worsleyschool.
