Colligative Properties, Freezing Point Depression Chemistry Lab Activity

In this colligative properties lab, students drop the freezing point of ice using salt, and then use that to make ICE CREAM! This is by far, the most popular lab in my classes, and past students come by to reminisce about it all the time. It is great for a Friday, or just before a vacation, but also excellent to integrate into your Solutions Unit.

WHO IS IT FOR?

This lab can be used in one of two contexts:

1. For first year chemistry students: a study of salts can cause freezing point depression
2. COMING SOON: For physical science students: a study of heat flow

HOW TO USE IT

• I like to use this lab activity with my chemistry students at the end of the Solutions Unit, before a break or as a finale to the school year

FEATURES

• Engaging
• Delicious
• Written conclusion to synthesize thoughts
• Pre and post lab questions to help guide students through concept

WHAT MATERIALS ARE REQUIRED?

Per each student (can cut recipe in half)

• 1 cup of whole milk
• 1/4 cup of sugar or 1/4 cup of Nesquick powder
• 1/4 teaspoon of vanilla extract
• A ziplock sandwich bag
• A ziplock gallon bag
• Ice
• About 1/2 a cup of kosher or sea salt
• A bowl
• A spoon
• Ice cream toppings!

WHAT’S INCLUDED

• Lab activity: Post lab questions and a written conclusion
• "How to Write a Chemistry Lab Report"
• Conclusion sentence starter prompt for differentiation
• Answer key with sample responses

INTERESTED IN MORE?

You can find this lab activity in my Full Year Chemistry Lab Book.

This product by Kelsey Reavy is copyrighted for single classroom only. This product may not be resold and can be copied for personal use within a classroom only. If you have questions, please email kelsey@kelseyreavy.com © Kelsey Reavy

Please Note: This is a digital product. No physical item will be shipped. After purchase, you’ll receive a link to download your files directly on the order confirmation page, and a download email will also be sent to you.