To determine the freezing point of a solution, heat must be removed from a sample. A cold sink is needed (a home freezer, a water-ice bath, or salt-water-ice bath is often sufficient). In any event, the cold sink has to be able to absorb enough heat from the sample to cause it to freeze. (This is how a ice cream machine works.) A thermometer is then used to record the decreasing temperature of the sample until it freezes, indicated by a visible change in appearance or State. Plotting the temperature readings will also give a clear indication of the freezing point. There are more sophisticated methods and equipment, but this is the basic method.
Tip: In the case of a liquid solvent, the freezing point is always slightly less than for the pure solvent.
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The freezing point of water is typically measured using a thermometer. When water turns from a liquid to a solid state (freezing), the temperature will remain constant at 0 degrees Celsius (32 degrees Fahrenheit). By observing the temperature change as water is cooled, you can identify the freezing point.
You have a freezer that goes below zero and you keep lowering the temp, slowly, until the water freezes. Then you note that temp.
It is the point at which something freezes, thus when it starts freezing you have found a freezing point.
Although a thermometer CAN be used its presence affects the temperature.
0 degrees Celsius is the freezing point of water. It is the temperature at which water changes from a liquid to a solid state.
Salt decreases the freezing point of water and increases the boiling point of water.
The freezing point of water is 0 degrees Celsius and the boiling point is 100 degrees Celsius.
Freezing point of water is 0 C and boiling point is 100 C.