Table salt and many
other chemicals can affect the freezing and boiling points
of water. This is the concept behind many products in the market
such as Anti-freeze, ice-melters, etc.
However, those are not the only
practical applications of this project. Many years ago, ice cream
manufacturers used to make ice cream without electricity and
How did they do that?
You may even want to create
a low temperature for an experiment without using your refrigerator.