Homemade Freezer Experiment

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In this experiment we will create a homemade freezer and make ice cream. Ice cream requires very cold temperatures below freezing to come out well. Salt will be used to lower the freezing point of ice.


  1. A bag of ice cubes
  2. A cup of salt (NaCl)
  3. 200ml milk
  4. Ice cream powder
  5. String rod
  6. Beaker (500 ml)
  7. Strong zip-lock bags (2liters)(500 ml
  8. Alcohol thermometer
  9. (25 ml) beaker

Experiment (Part 1):

  • Put a few ice cubes in a beaker.
  • Measure its temperature using the alcohol thermometer.
  • Add a spoon of salt.

Experiment (Part 2):

  • Mix in the 500ml beaker the milk and the ice cream powder.
  • Pour the mixture in the small zip lock bag and seal it.
  • Put the sealed bag in the bigger bag with the ice and salt.
  • Seal the bag and shake very well.
  • Leave it for 4 hours but keep shaking periodically.

What do you expect will happen?

If you did the experiment, what did you discover? Why does salt lower the freezing point?

Rating: 4.00/5. From 2 votes.
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