Hematite and magnetite samples are tested for magnetism.
Precipitation reactions are used to produce iron(III) oxide (Fe2O3 called hematite) and mixed iron(II)/iron(III) oxide (Fe3O4 called magnetite). The particles in the slurry of hematite are not attracted to a magnet, but the particles in the slurry of magnetite are.
Discussion:
Note: the liquids poured into the petri dishes are the suspensions prepared in the associated movie on this topic.
Credits:
- Design and Demonstration
- George Gilbert Denison University, Granville, OH 43023
- Video
- Jerrold J. Jacobsen University of Wisconsin - Madison, Madison, WI 53706
- Text
- George Gilbert Denison University, Granville, OH 43023
- Kelly Houston Jetzer University of Wisconsin - Madison, Madison, WI 53706
- David Phillips Wabash College, Crawfordsville, IN 47933