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<strong>Bonding</strong> <strong>Unit</strong><br />
Activity #3: Ionic, Covalent, and Metallic <strong>Bonding</strong> Lab<br />
Question<br />
What physical properties do ionic, covalent, and metallic compounds exhibit?<br />
Materials<br />
NaCl sodium chloride (ionic)<br />
C 6 H 12 O 22 sugar (polar covalent)<br />
C 18 H 36 O 6 stearic acid (nonpolar covalent)<br />
Aluminum granules (metallic)<br />
Test tubes<br />
Balance<br />
Bunsen burner<br />
Test tube holder<br />
Small beakers<br />
Stirring rods<br />
Conductivity tester<br />
Mortars and Pestles<br />
Safety Concerns<br />
Wear goggles and lab apron. Avoid contact of all chemicals with eyes and skin. Tell<br />
students to use small amounts of the chemicals for each test. Each lab group should<br />
only need about one gram of each substance, which should be enough to do all of the<br />
tests. When heating the substance, students should hold the mouth of the test tube<br />
away from others. All chemicals in this lab can be disposed of according to Flinn<br />
Suggested Disposal Methods #26a and b. Consult MSDS for any additional safety,<br />
handling, and disposal information.<br />
Real World Connections<br />
Minerals are ionic compounds that are composed of unit cells of specific geometric<br />
shapes.<br />
The understanding of physical properties of specific compounds is the foundation for<br />
development of new materials by scientists and engineers.<br />
Source:<br />
Lab adapted from M. Wiseman, IB Chemistry Teacher<br />
(Website: www.mwiseman.com/courses/chem_ib/) and also Flinn Scientific “Chemtopic<br />
Labs: Chemical <strong>Bonding</strong> Volume 5”
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