The last means by which light could be generated is through chemiluminescence. In such a case a chemical reaction occurs, causing an excitation of the product. As this product decays into its standard state, light is emitted. This form of luminescent is different from the previous two in the sense that no absorption of light is required to induce the glow. The glow results from the product of the chemical reaction having to be in an exited state or of higher…
I placed about 0.5 mL of 8 different chemicals into 8 different places in the 24-well plate. I then lit the handy wick to keep a flame burning. I soaked a cotton swab in the first chemical and moved the cotton swab in and out of the flame rapidly to see the flame color change. I then repeated this process for the rest of the chemicals.…
Matt Cramer Alex Chen 2/7/17 Food Dye lab Spectroscopy of Food Dye Lab Introduction You’re coming off the field after a hard fought game against your rival team. You are needing a drink and you grab a blue Powerade off the managers table. The drink delivers the electrolytes needed to sustain throughout the rest of the day. Then, the athlete starts to think how much of his blue Powerade is actually made from the blue food dye.…
In reference to the collision theory, molecules act as small spheres that collide and bounce off each other, transferring energy among themselves when the collide. In order for a reaction to occur, there must be collisions between molecules. Through experimentation, factors are discovered that influence the reaction rates of chemical reactions include the concentration of reactants, temperature, surface area, the physical state of reactants, and a catalyst. This experiment regarding the factors that affect reaction rate tests the effects of increased concentration and temperature of the hydrochloric acid solution (HCl) and also the effect of increased surface area of magnesium metal (Mg). When glow sticks are immersed in a hot water bath, it is proven that they glow with greater intensity. This proves that an increased temperature has an effect on the reaction itself, allowing molecules that make up the liquid inside the glow stick to move with greater speed, resulting in more collisions. The balanced equation for this reaction would be: Mg (s) + 2 HCl (aq) = MgCl2 (aq) + H2 (g)…
4) Do you think there was a difference in the amount of charge on one of the dye molecules? Explain the reasoning for your…
Discussion of Theory: Chromatography, resolution and selectivity played major roles in making the experiment work. The experiment demonstrated a common use of chromatography, and works to explain a way to separate mixtures. The dyes were successfully separated and analyzed in the cartridge.…
1. The more pronounced reaction was the aluminum shot with the cupric chloride. It bubbled a lot more and this might be because the aluminum shot was more concentrated with aluminum and cupric chloride must have a reaction to aluminum.…
Procedure: In this experiment, various chemicals were mixed together, to determine a reaction. Using two drops from chemical 1 and two drops of chemical two, unless otherwise stated, then recording the type of physical reaction or color changes that occurred.…
The light from a glow stick will extinguish more quickly at higher temperatures because temperature affects the rate of the chemical reaction.…
electrophoresis. Some of the dyes will be attracted to the negative electrode and some to the positive…
The purpose of this experiment is to investigate and learn how temperature affects the blue glow created by the chemical luminol. Investigating this will help crime scene investigators investigate more effectively and more efficiently. There is a protein molecule in blood called hemoglobin that provides the catalyst that is needed to trigger chemiluminescence which allows a luminol base and hydrogen peroxide solution to be sprayed on a surface to begin giving off an distinctive blue glow if blood is present. To showcase its luminescence, the luminol chemical substance has to be activated. Normally, the activator is a solution of hydrogen peroxide (H2O2) and sodium hydroxide (NaOH) found in water.…
3. Why do the chemicals have to be heated in the flame before the coloured light is emitted?…
Inside each firework are small packets filled with chemicals, mainly metal salts and metal oxides, which react to produce an array of colors. When heated, the atoms of each element in the mix absorb energy causing its electrons to rearrange from their lowest energy state to a higher excited state. As the electrons plummet back down to their lower energy state the excess energy gets emitted as light.…
Organizations have always looked to their IT departments for the expertise and creativity to develop new products and services. However, the productivity of IT teams varies widely, in part because of the vastly differing access to tools and technologies that organizations provide to these workers to support the way in which they work. This fact has serious implications when we consider three major changes now taking place in the as relates to social computing since these changes are increasingly having an impact to the ways people interact with each other.…
The novel 1984 was written by George Orwell in 1948, almost half a century before the year in which the novel was based. In this essay, I will demonstrate that the social and political environment at that time in history as well as the author’s personal life and conditions had a tremendous impact on the concept and completion of the novel.…