In this lab experience, students carry out an investigation to determine the melting points of different compounds and determine that the melting point is related to the degree of ionic character. Students will conclude that the more ionic in character a material is, the higher its melting point will be.
Safety:
Before conducting the lab, review the safety precautions on the student page with the class. Then discuss any safety precautions that are specific to your science laboratory or classroom. Good ventilation is required since ammonium acetate can produce acetamide when heated.
Materials Included in Kit
Consumable:
Acetic acid, glacial, 70 mL
Ammonium acetate, 100 g
Sodium acetate, anhydrous, 60 g
Sodium chloride, 100 g
Weighing dishes, 30
Additional Materials Required Beakers, Borosilicate Glass, 250 mL, 10
Bunsen Burner, Natural Gas, 10
Flinn Scientific Electronic Balance, 210 x 0.01-g, 10
Flinn Digital Thermometer, 10
Heavy-Walled Test Tubes, 16 x 125 mm, 30
Test Tube Rack, Economy Choice, 10
Thermocouple (requires Vernier interface, such as TC1549 Go! Link), 10
1-800-452-1261
