At 0 degree Celsius, water molecules slow down enough to bond with each other and ice starts to form. By adding more salt or sodium chloride the freezing point of water becomes even lower, Why is that ________. could it be that when water molecules rip apart sodium chloride (fragile ionic bonding) it gains some energy which prevents itself from bonding with other water molecules? Sounds weird because I always thought that the hydrogen bonding is the weakest among the different types of chemical bonding.