By David Muelheims
««« Contributed by James Palcik
Chemiluminescence is an unusual chemical property in that it allows certain compounds to spontaneously give off light. In this demo, hydrogen peroxide is added to a luminol solution in a darkened room. The resulting chemical reaction produces a blue light that lasts for several minutes.
Curriculum Connection: Grade 10 Chemistry, Academic and Applied; Grade 11 and 12U Chemistry. This activity examines the concept of Energy of Reactions. Continue reading
The lesson here is a good one and it applies to all your favorite demonstrations—they make terrific inquiry labs for your students!
This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers –http://elearning.flinnsci.com
ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting.
Several components in a plastic bag are exposed to water. Upon mixing, a slow and steady evolution of heat occurs due to the oxidation of iron and reduction of oxygen in the presence of sodium chloride and calcium chloride catalysts. Continue reading
Many teachers demonstrate the reaction of lithium, sodium and potassium with water when discussing the trend in reactivity of the alkali metals. Continue reading