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Allow students to learn about polymers and cross-linking using this fun and colorful activity. Students add a solution of sodium alginate to three calcium chloride solutions, each containing a different fluorescent dye. After a few minutes the liquid sodium alginate solution forms into gel-like polymer “worms”. Upon completion of the activity, the worms may be placed under a black light and the students will observe their worms glow red, blue, and green.
Contains enough material to make several dozen polymer worms.
Kit Includes:Sodium alginate, 6g0.1M calcium chloride/0.1% fluorescein, 1L0.1M calcium chloride/0.04% rhodamine B, 1L0.1M calcium chloride/0.5% quinine sulfate, 1L3 Empty bottles w/flip-top caps6 Forceps
Materials Needed but not Supplied3 Containers for calcium chloride solutions (such as beakers, glass jars, or plastictrays)Black light
DOT Info:Non regulated