When a saline solution is subject to freezer temperature, does it expand as much as water would?
Vocabulary colligative property eutectic mixture eutectic point heterogeneous mixture homogeneous mixture phase map ppt When moderately salty water freezes, you might expect a uniformly mixed salt and ice crystal to form (after all, the salt and water were homogeneously mixed in the first place). But that’s not what happens. First, tiny platelets and needles of ice form over the surface of the liquid. The ice crystals incorporate water, but leave the salt behind, so the solution becomes saltier and saltier as the freezing continues. Finally, the flat ice crystals grow together, trapping small pockets of concentrated brine inside. A cloudy, brittle frozen slush forms. Predicting the volume of that slush isn’t easy. The trapped brine drains over time, leaving behind trapped air bubbles that can dramatically lower the overall density. The density of pure ice is about 0.92 g/mL. The bubbles and pores in salty ice can make its density significantly less dense than pure ice (perhaps 0.8-0.9
