Molality and Change in Freezing Point

Chemistry
Written By Sureen Heer

Overview

Link to Experience: Molality and Change in Freezing Point

Topics: chemistry, molality, freezing point, moles

Grades: 9-12

Standards:

Duration to complete: 5-7 minutes

Learning outcome: Students will understand how to visualize and calculate molality. They will apply this knowledge to figure out how to determine how much salt should be used to melt snow.

In the Classroom

Pre-Experience (Things to Look Out For):

  • Why is salt used to melt snow?

  • How do people determine how much salt to use to melt snow?

  • What are moles and what is freezing point?

Post-Experience (Things to Think About):

  • How does the number of moles of salt impact its molality?

  • How does changing the temperature change how much salt should be added?

  • What is a molal constant?

Sureen Heer
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Molecular Geometry