Conductivity of Solutions

A light bulb is lit when the conductivity probe is immersed in an ionic solution.

Video of the demo in action https://youtu.be/4WillWjxRWw

The solutions are all in labeled 250ml beakers. All are about 150 ml of 0.1M sol'n. In order, the solutions are: tap water, distilled water, sodium chloride, sucrose, acetic acid, hydrochloric acid, sodium hydroxide, ethanol, and barium sulfate. (See video: http://youtu.be/4WillWjxRWw?hd=1)

The simple conductivity tester is on the bench, for the instructor to plug in. An 800ml beaker with 400 ml of distilled water is provided as a rinse station for use between samples.

See the discussion in Electrical Conductivity of Liquids, in Shakhashiri, B. Z. Chemical Demonstations: A Handbook for Teachers of Chemistry, Vol. 3; The Univ. of Wisconsin Press, Madison, WI, 1989; pp.326-328.

Gloves and safety glasses.