Xtreme STEM
DashX

Salty Ice cream

 

Introduction

There is a lot of science behind Ice cream! 

Think about what happens if you put a lot of ice cubes into a glass of water; does it freeze the water or melt the ice? Why?

What if you put a bag of water in a bag full of ice - what would happen?

Does ice cream freeze the same as water?
Will it freeze at the

 

Tries: 0

 

Materials

  • Big bag
  • Small bag
  • Milk 100mL
  • Cream 100mL
  • Sugar 50mL
  • Flavoring 1.5mL
  • Ice 500mL
  • Salt 250mL

Ingredients (Small Bag) - DashX's Recipe

  1. Place the sugar into the small bag
  2. Add your desired flavoring to the small bag
  3. Add the cream into the small bag
  4. Add the milk into the small bag
  5. Wash a thermometer and measure the temperature of the mixture in the small bag
  6. Squish the air out of the small bag and seal it

Temperature of "ice cream" mixture before starting:

* Your Own Recipe *

These steps are only for students who brought their own ice cream mixture

  1. Measure out 200mL of the mixture you prepared at home
  2. Pour the 200mL of your mixture into the small bag
  3. Wash a thermometer and measure the temperature of the mixture in the small bag
  4. Squish the air out of the small bag and seal it

Temperature of "ice cream" mixture before starting:

Ice (Big Bag)

  1. Place the Ice in the big bag
  2. Measure the temperature of the ice in the bag
  3. Sprinkle the salt all over the ice in the big bag
  4. Make 100% sure your small bag is sealed shut
  5. Place the small bag inside the big bag
  6. Squish most of the air out of the big bag and close it
  7. Rock the bag back and forth on the table for 10-15 minutes
  8. You may want to use a glove (it gets very cold)
  9. Keep mixing and shaking until you feel the liquid get thicker and more solid

Temperature of ice at start:

Ice cream!

  1. When your ice cream is thick and frozen (like soft serve) you will need to do all these steps quickly
    (Your ice cream will melt quickly - it will only last about 3-5 minutes)
  2. Open the big bag and record the temperature of the ice
  3. Remove the small bag
  4. Wipe the bag-top opening really well (so no salty water gets in your ice cream)
  5. Wash the thermometer and record the temperature of your ice cream
  6. Eat your ice cream!
    (You can use a spoon to eat it straight from the bag, or try to scoop it into a cone)

Temperature of ice with salt:

Temperature of ice cream end:

Conclusion - Question

What did the salt do to the temperature of the ice?

 

Tries: 0

Conclusion - Question

Would this experiement work without salt?

 

Tries: 0

Clean-up

  1. Place your small bag in the bin
  2. Pour the salt & water mixture into the sink
  3. Place your big bag in the bin
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