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Find your Carolina Sales Manager for K-8 Smithsonian and Building Blocks of Science Programs.
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Students create, analyze, and interpret thermal curve models and use the colligative property freezing-point depression to determine sample purity and identify an unknown. They connect prior knowledge about states of matter with intermolecular forces to better understand what happens on a molecular level during phase changes. General lab equipment, including forty-five 100-mL beakers, is needed but not included. Materials support 15 student pairs.
Using heating-curve models, cooling-curve models, and the colligative property freezing-point depression, students determine a sample's purity and identify an unknown mixture. They also build an understanding about the role intermolecular forces play during a substance's phase changes. General lab equipment, including forty-five 100-mL beakers, is needed but not included. Materials support 15 student pairs. Note: Finely crushed ice (needed but not included) is recommended for optimal results. If a source of finely crushed ice is not readily available, then the desired consistency can be achieved using a blender or any mechanical device designed to convert ice cubes or chunks into a snow-like texture.
This kit is designed to be incorporated into a larger unit of instruction consisting of multiple experiences and taking place over several weeks. Anchoring phenomena for a larger unit of instruction may be derived from the following topics:
Kit includes free 1-year access to digital resources that support 3-dimensional instruction for NGSS.
|Lauric Acid, 50 g||1||Included|
|Stearic Acid, 30 g||1||Included|
|Palmitic Acid, 20 g||1||Included|
|Marble Chips, 100 g||1||Included|
|Carolina Science Online® Resources (1-year subscription)||1||Included|
|Teacher’s Manual with Reproductible Student Guide||1||Included|
|Hot Plates||15||Needed, Not Included|
|Thermometers||30||Needed, Not Included|
|Beakers, 50 mL||15||Needed, Not Included|
|Beakers, 100 mL||45||Needed, Not Included|
|Beakers, 200 mL||8||Needed, Not Included|
|Beaker Tongs||15||Needed, Not Included|
|Crucible Tongs||15||Needed, Not Included|
|Test Tube Tongs||15||Needed, Not Included|
|Watch Glasses||15||Needed, Not Included|
|Timers||15||Needed, Not Included|
|Spoons||4||Needed, Not Included|
|Grease Pencils||15||Needed, Not Included|
|Wash Bottles with Distilled Water||15||Needed, Not Included|
|Mortar and Pestle Set||1||Needed, Not Included|