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ELECTRICAL CONDUCTIVITY

1 ELECTRICAL CONDUCTIVITY OBJECTIVES: 1. To observe the ELECTRICAL CONDUCTIVITY of various pure liquids, ionic solids, metals and aqueous solutions using a CONDUCTIVITY probe and LED CONDUCTIVITY indicator. 2. To classify substances as strong, weak or nonelectrolytes. 3. To observe the changes in CONDUCTIVITY during the course of double displacement reactions. DISCUSSION 1. ELECTRICAL CONDUCTIVITY of molten compounds a. Ionic compounds, in the solid state, are composed of ions that are not free to move.

Measure the conductivity of each solution by using the conductivity probe. Record your observations. Now, in a clean small beaker fill it with 5 mL of 0.10 M H 2SO 4, place the conductivity probe into the solution and then slowly add the 0.10 M Ba(OH) 2 solution drop by drop. Mix well after the addition of each drop by gently swirling the beaker.

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