Dissolve five heaping teaspoons of table salt in 450 g (450 ml) of water. Considering that the mass of salt

Dissolve five heaping teaspoons of table salt in 450 g (450 ml) of water. Considering that the mass of salt in each spoon is about 10 g, calculate the mass fraction of salt in the solution. Take two identical 0.5 liter plastic bottles. Pour the resulting solution into the 1st, and tap water into the 2nd. Place the bottles in the fridge freezer. Take a look in the refrigerator after about an hour. Which liquid starts to freeze first? In which bottle will the contents turn to ice first? Make a conclusion.

The mass fraction of salt in the solution is 0.1 or 10%. Tap water will freeze earlier, and the contents of a bottle of table salt will turn to ice earlier.