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Abstract. You may have seen police investigators on TV spraying a crime scene with a liquid that glows blue if there is any blood present. Luminol is the chemical which causes the glowing. In this chemistry science fair project, you will investigate what factors make this interesting molecule "light up."
Chemiluminescent objects, such as glow sticks, use chemical energy to produce light. When you twist or bend a glow stick, you start a chemical reaction. One of the products of the reaction is light. There are three components of a glow stick: a solution of hydrogen peroxide, a solution of a phenyl oxalate ester, and a fluorescent dye.
In order to activate a lightstick, you bend the plastic stick, which breaks the glass vial. This allows the chemicals that were inside the glass to mix with the chemicals in the plastic tube. Once these substances contact each other, a reaction starts taking place. The reaction releases light, causing the stick to glow.
Oct 28, 2020 · The Science (Spoiler Alert): Temperature affects the rates of chemical reactions. Usually, temperature speeds the rate of a reaction. This applies to the glow stick reaction, too. At higher temperatures, the reaction releases more energy to excite the fluorescent dye. The glow stick glows more brightly, but the reactions reaches its conclusion ...
In chemiluminescence, energy from a chemical reaction excites the electrons of a substance. When the electrons release the energy, it’s in the form of light of a particular colour. Some substances can store light energy. When light (from the sun or a lamp) shines on a phosphorescent (glow-in-the-dark) sticker, the electrons in the sticker are ...
In this demo, students witness the creation of blue light from a chemical reaction, an example of luminescence. This is similar to the reactions that fireflies uses to emit light, and to those used in "glow-sticks" and some roadside emergency lights. In the demonstration vial is a mix of luminol, perborate and copper sulphate.
People also ask
Why does a lightstick glow?
How does a chemical reaction produce luminescence?
What makes a molecule 'light up'?
Does a lightstick slow down a chemical reaction?
How do glow sticks work?
How does temperature affect a glow stick reaction?
Jul 21, 2022 · The collection of student science fair projects and STEM learning resources highlighted here is "colorful" in a different way. These experiments are about the science of color and help students ask and answer science questions about chemical reactions, the physics of light, including wavelength and refraction, how colors of light mix, and more.
