Science - Chemistry
Standard 3 Objective 1
1 class periods of 70 minutes each
Students will measure the conductivity of several compounds and solutions in order to predict the bond types (ionic or covalent) in the substances tested.
Students should know that electrical currents are produced and measured by the movement of positive or negative particles; and that in solids only negative charges (free electrons) can move.
Teacher's demos: (optional)
KClO3 can explode or ignite if it is heated to decomposition or mixed with acids or organic matter. Heat it just unitil it melts, use it behind a demonstration shield or a hood.
Molten: Place about 3 g of the solid in an evaporating dish and heat to melting with a burner.
If you don't want to demo these then just delete them from the data table.
This lab works best in the dark--you can see the light bulb better
Note: Additional compounds may be used, of course.
Directions for student lab are detailed on the student worksheet attached.
Lesson Design by Jordan School District Teachers and Staff.