JKNS

Salt is needed to make ice cream. By disolving the salt in the ice, freezing point of the ice decreaces. This __colligative property__ is called __freezing point depression__. This property is when a dissolved solute lowers the freezing point of its solution.When salt comes in contact with ice, ice melts and its temperature will drop as low as 10 degrees Celcius,because this phase change is called __endothermic__. during this prosses the heat in the ice cream is obsorbed by the ice/salt causeing the ice cream to freeze. In addition, as salt is exposed to ice, salt's ions will start to __dissociate__ into Na+ and Cl- __ions__ .