1. Lab Activity In your composition book on the next clean page: Title- Electrolyte and Non Electrolyte Nov 4, 2013 Make a data table like the one on the following slide. Copyright McGraw-Hill 20091

2. Data Table SubstanceFormulaLight on or off ElectrolyteNon Electrolyte Tap water Distilled water Salt water Sugar water Hydrochloric acid Sodium Hydroxide Acetic Acid Ammonia Copyright McGraw-Hill 20092

3. Solutions Electrolytes and Non Electrolytes Copyright McGraw-Hill 20093

4. 4 Electrolytes and Nonelectrolytes –Electrolyte: substance that dissolved in water produces a solution that conducts electricity Contains ions –Nonelectrolyte: substance that dissolved in water produces a solution that does not conduct electricity Does not contain ions

5. Copyright McGraw-Hill 20095 Dissociation - ionic compounds separate into constituent ions when dissolved in solution Ionization - formation of ions by molecular compounds when dissolved

6. Copyright McGraw-Hill 20096 Strong and weak electrolytes –Strong Electrolyte: 100% dissociation All water soluble ionic compounds, strong acids and strong bases –Weak electrolytes Partially ionized in solution Exist mostly as the molecular form in solution Weak acids and weak bases

7. Copyright McGraw-Hill 20097

8. 8 Examples of weak electrolytes –Weak acids HC 2 H 3 O 2(aq) C 2 H 3 O 2  (aq) + H + (aq)‏ –Weak bases NH 3 (aq) + H 2 O (l) NH 4 + (aq) + OH  (aq) (Note: double arrows indicate a reaction that occurs in both directions - a state of dynamic equilibrium exists)

9. Copyright McGraw-Hill 20099 Method to Distinguish Types of Electrolytes nonelectrolyteweak electrolytestrong electrolyte

10. Copyright McGraw-Hill 200910 Classify the following as nonelectrolyte, weak electrolyte or strong electrolyte –NaOH strong electrolyte –CH 3 OH nonelectrolyte –H 2 CO 3 weak electrolyte