Introduction
Total breakfast cereal is poured into a beaker, water is added along with a magnetic stir bar, and the mixture is stirred for about 30 to 45 minutes on a magnetic stirrer.
Supplies
Short List
- Box of Total cereal
- Beaker
- Stir bar
- Water
- Hot plate with stirrer
- Tongs
Prior to Lecture (prep time ~ ? min.)
- Provide a box to Total cereal, a large beaker (600 to 1000mL), a large magnetic stir bar (about 8cm. long), a pair of tongs, a magnetic stirrer, and water.
To Conduct Demonstration
- At the beginning of class fill a 600 to 1000mL beaker about half full with Total breakfast cereal.
- Add enough water for easy stirring of the mixture.
- Add a large white magnetic stir bar (about 8cm. long) and place on a magnetic stirrer. Allow the mixture to stir at a slow to medium speed for about 30 to 45 mins.
- Carefully remove the stir bar with a pair of tongs and show the students the iron filings collected on it.
Demo Time: ~50 minutes
Safety and Disposal
There are no safety or disposal concerns associated with this demonstration.