Chemiluminescence is a chemical reaction that gives off light. In chemiluminescence, two chemicals from the ground state react (Welsh). The ground state is the lowest energy state of an atom. It is also the most stable state of an atom. This reaction causes the two chemicals to go into the excited state (Welsh). The excited state occurs when an atom has a higher energy state than at the ground state. The two chemicals break down causing a certain amount of the energy to be released as light or photons. The chemical reaction can be described by the formula A + B —> AB* —> Products + Light (Welsh). These reactions give off no heat or “cold light” (“Luminescence and Fluorescence”). Chemiluminescence is used in living things, career tools, and everyday …show more content…
Examples include fireflies and jellyfish. Fireflies ignite their light through a chemical reaction. Oxygen combines with calcium, adenosine triphosphate, and the chemical luciferin to start the chemical reaction that creates light (“How and why do fireflies light up?”). Secondly, chemiluminescence is used in forensic. Forensic scientists can locate blood at a crime scene all though the reaction of luminol, hydrogen peroxide, and iron. Iron is present in all samples of blood no matter how small. If a forensic scientist suspect blood on the ground of a crime scene, he simply apply luminol with a diluted form of hydrogen peroxide. The iron will act as a catalyst or a reaction starter. For approximately thirty seconds, if blood is present, the ground will glow in the dark. The only problem with using chemiluminescence is that further testing may not be accurate after all the chemicals have been mixed (Welsh). Nevertheless, chemiluminescence is used to help close crime cases. Finally, chemiluminescence is used in glow sticks. Glow sticks create a chemical reaction when you bend it. Inside the glow stick are a glass tube and liquid. The glow stick’s plastic tube
That familiar fizzing you hear when you drop an Alka Seltzer tablet into a glass of water is the result of a chemical reaction, and chemical reactions are extremely prevalent when it comes to what living things do to carry out life processes. In addition, environmental conditions can alter the results of chemical reactions, and in this lab, we will be answering the
Fluorescence measurement provides very important information about the photochemistry of a particular molecule. The first part of this experiment was dealing with the fluorescence behavior of a Leucophor PAF. Information from both spectrophotometry and fluorimetry was used to measure the quantum yield as well as to explain why Leucophor PAF was use as commercial optical brightener. The second part of this experiment dealing with fluorescence quenching of quinine bisulphate solution (QBS) is the presence of sodium chloride.
The physical characteristic for this reaction is that the colour changes from purple to colourless.
This experiment synthesized luminol (5-Amino-2,3-dihydro-1,4-phthalazinedione) and used the product to observe how chemiluminescence would work. The starting material was 5-nitro-2,3-dihydrophthalazine-1,4-dione, which was, after addition of reaction agents, refluxed and vacuum filtered to retrieve luminol. Using two stock solutions, we missed our precipitated luminol with sodium hydroxide, potassium ferricyanide, and hydrogen peroxide, in their respective solutions, in a dark room, to observe the blue light
Input variables In this experiment there are two main factors that can affect the rate of the reaction. These key factors can change the rate of the reaction by either increasing it or decreasing it. These were considered and controlled so that they did not disrupt the success of the experiment. Temperature-
One type of reaction that produces chloromethane is a photochemical reaction. Photochemical reactions occur because light shines down upon the reaction and provides the heat and energy required to start the reaction. When the light comes into contact with diatomic chlorine, the reactions begins; Cl2 → 2Cl●. A free radical reaction follows. Free radical reactions are reactions that involve free radicals. Free radicals are singular atoms or molecules that have one unbonded electron, which is denoted with a ●, or dot, next to the element or molecule. The second step commences when one of the original radical chlorine atoms combines with methane to create a radical methyl group and hydrochloric acid; CH4 + Cl● → CH3● + H Cl. The radical methyl group then becomes an intermediate when it becomes a product along with diatomic chlorine to finally produce chloromethane and a radical chlorine;CH3● + Cl2 → CH3Cl + Cl●. Methylation takes place during this third step in the photochemical process also. Methylation is the addition or subtraction, in this case addition, of a methyl group into a re...
Any word coloring will change the color of slime. Such as Galaxy Slime, you should add silver, purple, white, pink, and little bit of black. For your Galaxy Slime it is a colorful slime and one of the most fun slime. So have fun making it!
The concentration is the amount of particles in a certain amount of water. If a cross is placed under the beaker of the solution, the cross will eventually disappear because the high temperature of the water will make the particles move faster because they have more energy and they will move more quicker to give a bigger impact which will cause more frequent and violent collisions and the solution will disappear as the product forms to create a misty solution. The rate of reaction is normally recorded in tables and can then be defined onto graphs to show how the rate curves of different factors affect the speed of the reaction. A rate curve is the curve of a graph that shows how the reaction changes at different intervals.
Food coloring is typically used in food and drink products. Another term used for food coloring is artificial color. It is added to give the product a certain colored appearance. Food coloring can come as a gel, paste, liquid, or powder. Food coloring contains various chemicals but is often based from petroleum
On the internet I was able to find out the numbers of red and yellow
Have you ever wondered why yellow makes you irritated? Why purple makes you feel happy? Why green calms you? Why orange helps you feel energized? Many people think that colors are just colors. But in reality, colors have been useful throughout the years as they have an huge impact on our lives. Many of us need to be aware of colors that surround us in everyday life.
of a gas, liquid, or other substance-are excited so that more of them are at
Overall my aim from the experiment conducted was achieved as; the factors that affect the rate of a chemical reaction were discovered. My hypotheses were proven as; a catalyst increases the speed of a reaction, larger surface area have a faster reaction rate, additional stirs make the reaction occur faster, the higher concentration levels quicken the rate of a reaction and temperature speeds up the reaction time. The investigation was a fair test as all variables were controlled as my results support this. Although the practical activity could be improved if it was to be repeated. Altogether it was a fantastic learning experience that I am grateful for participating in.
In the world of fascinating sights, colors are all are found everywhere in all sorts of ways. Colors are put into categories and types depending on what one is looking at. Some categories of colors may include: value-tints/shades, complementary colors, analogous colors, cool colors, warm colors, and neutral colors. The types of colors within these categories include: primary, secondary, tertiary, complementary, analogous, active and passive colors. These types and categorizes can be seen in a circular diagram that is divided by hue, saturation, and value called, the color wheel. The color wheel consists of all colors that are within the visible spectrum. The electromagnetic spectrum A basic color wheel includes: red, orange, yellow, green, indigo, and violet. As one looks cl...