ClassHall Instructor Staff asked 6 years ago
This question has fascinated me since I came across it as a fact, but I wonder how it is possible? What makes ice get colder when salt (sodium chloride – NaCl) is added to it?
3 Answers
Zainab Ahmadu answered 4 years ago
The salt dissolves into the liquid water in the ice and lowers its freezing point. As to why, Energy is required to snap the hydrogen bonds that hold the ice together.
Sadiq Barau answered 4 years ago
Salt works to depress the freezing point of water so the water can become colder than 32 degrees Fahrenheit (zero degrees Celsius) before it turns to ice. … This salt water has a lower freezing point, so the temperature of the ice bath can get even colder, thus freezing the ice cream more quickly.
Maryam