Hello Guys:)

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

Materials:

A bag of ice cubes

A cup of salt (NaCl)

200ml milk

Ice cream powder

String rod

Beaker (500 ml)

Strong zip-lock bags (2liters)(500 ml

Alcohol thermometer

(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?