Do you know that the freezing point of water is 0ºC or 32ºF? Ice is created when water is frozen past this freezing point. When water freezes, the particles are tightly packed together and are more static (still) than when it is in the liquid state. It becomes solid rather than liquid.

And do you know that salt melts ice? Yes, salt!!! It lowers the freezing temperature by disrupting the molecular balance.  There are different kinds of salt. And each kind contain basic concentrations and different molecular compositions.  Here is a practical test to prove our theory.

Practical Test

Which kind of salt melts ice the quickest?


  • Regular table salt (Common Salt)
  • Kosher Salt
  • Epsom Salt
  • Rock Salt
  • 5 blocks of ice
  • Clear plastic containers/ boxes big enough to hold the blocks of ice


  1. If you do not have blocks of ice ready, then your first step should be to pop some water into the freezer and to make the ice. The ice you make should be approximately the same size.
  2. Once you have the ice ready, set them in separate clear plastic containers, side by side. Label these containers with the kind of salt that will be added to it.
  3. Sprinkle an even amount of each kind of salt in each separate container.

Now, you’ll just have to wait to see what happens! 10-minute intervals are good times to check on the ice.

  1. Observe the progress of the melting ice and record your findings until all the ice has melted.
  2. Record your results.

How fast did it take for all the ice to melt out of each container?  Voila!!


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