Page 28 - Demo

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CHEMISTRY FUN, CONTINUED
Blueprint T-Shirts—Student Laboratory Kit
Use the Sun’s ultraviolet radiation to make one-of-a-kind photosensi- tive T-shirts! Prepare shirts in a solution of iron salts. When they are dry, students place opaque objects on them and expose them to direct sunlight. UV light on the fabric causes a light-activated redox reaction that turns exposed areas dark blue while the area under the object remains a sharp white. Includes student handouts and Teacher Notes. Complete for 30 students working individually.
AP6879 | $77.30
Becker Bottles—One in a Million
What does it mean for a contaminant to be in a concentration of one part per million (ppm)? The Becker Bottles make the concepts of molecular concentration and ppm more concrete for students. The “One in a Million” bottle contains 1 million tiny colored spheres, only one of which is black (1 ppm) while the “One in a Million Too” bottle has the same black sphere, but amid 999,999 yellow spheres for a stark visual that brings the concept to life.
AP4559 | One in a Million AP4854 | One in a Million Too AP4863 | Set of Two
| $51.35 | $48.90 | $94.85
For some lab flair, check our our
tie-dyed labcoats at flinnsci.com.
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Making UV-Sensitive Paper
Bring practical applications to spectroscopy, light or ultraviolet radia- tion lessons with a lab that mimics the photographic process. Students make sheets of photosensitive (blueprint) paper by dipping porous paper in two iron salt solutions. Students develop images of their choice by exposing the treated paper to ultraviolet sunlight. Includes Teacher Notes and necessary photographic chemicals for 100 “photo- graphs.” Complete for 30 students working in pairs.
AP6155 | $26.10
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