Physics Demonstrations at Cal Poly Pomona
Demo Index:
Pira Index:
Title:
CONDUCTIVITY OF SOLUTIONS
Description:
Demonstrates the electrical properties of solutions.
Equipment:
1. Light bulb apparatus
2. Table salt--5 ml container
3. Stirrer
4. Variac
5. Distilled water, half- liter bottle
6 4” plastic nalgene container
Procedure:
1. Set up the apparatus as shown in the figure.
2. Fill the glass with distilled water and turn on variac. Observe what happens. Turn the variac off.
3. Add some salt to the water, stir with the spoon and turn the variac on again. What happened now?
