Chemiluminescence Lab Report
Luminol is a chemical that forensic scientists use to find traces of blood at crime scenes. Before application, a crime scene investigator will assemble the solution by combining luminol, sodium hydroxide, and hydrogen peroxide. The sodium hydroxide and hydrogen peroxide are what initially sets off the chemical reaction with the luminol. Then the investigator sprays it over the crime scene. If there is any blood present, the iron in it will act as a catalyst in the chemical reaction. This specific sort of chemical reaction is known as chemiluminescence, which is basically the emitted light caused by a chemical reaction, which doesn’t result in significant heat. The amount of catalyst needed to actually conduct the reaction is minimal, in
Chem 100 Final Lab Report
1366 Words | 6 PagesCadet Eric Wiggins Date: 18 September 2014 Course Name: Chem 100 Instructor: Captain Zuniga Section: M3A Identification of a Copper Mineral Intro Minerals are elements or compounds that are created in the Earth by geological processes. The method of isolating metals in a compound mineral is normally conducted through two processes.
Jessica Lunsford Case Study
1685 Words | 7 PagesThe first step is to place a drop of distilled water on a sterile swab and swab a small portion of the suspect substance, The place the swab against a presumptive blood test and an immediate color change should occur if the reaction is positive. If the stain is negative the suspected blood stain may be ignored. If the reaction is positive an evidence number is assigned to the suspected blood and the stain is photographed and measured. The forensic technician should note the stain was collected due to a positive reaction. The blood is then collected and packaged, and the package is sealed and labeled for identification Upon collecting blood if the blood is wet a sterile swab should be rotated in the stain, transferring the blood to the swab.
Nt1210 Lab 10.1
831 Words | 4 PagesThis reaction does not cause a rise in temperature. One other source is triboluminescence which is light produced from friction. Another source is electric discharge which is light produced when an electrical current passes through air or another, like neon, that produces a glow. Another source is light-emitting diode which is light produced when an electrical current passes through a semi-conductor which controls how well is conducts electricity.
Double Displacement Reaction Lab Report
252 Words | 2 PagesIn cycle one, the double displacement reaction, Cu(s) + 4HNO3(aq) → Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) occurred, the result of the reaction was that the reaction mixture began to bubble with the copper filling dissolving and a vapor like substance leaving the reaction. Furthermore, when water was added, the color change, from brown to a blue color pigment. Then in Cycle two, another double displacement reaction occurred, Cu(NO3)2(aq) + 2NaOH(aq) → Cu(OH)2(s) + 2NaNO3(aq), which resulted in the reaction becoming cloudy and a darker shade of blue. Following cycle two, a decomposition reaction occurred as the result of heat being administered to the mixture, thus the following reaction occurred in cycle three, Cu(OH)2(s) → CuO(s) + H2O(l). As a
Chemical Reaction Lab
1332 Words | 6 PagesTyler White CHEM151LL 32658 04/01/2018 Different Types Chemical Reaction Types and Equations Purpose: The purpose of this lab experiment is to examine different types of chemical reactions such as Decomposition reaction, Synthesis reactions, Combustion reactions, and different Chemical equations. The experiments were conducted online using Late Nite Labs. Materials: Because the experiments were conducted online there wasn’t any physical use of materials, only digital ones, for these labs to be performed. Only the registration for the website was needed to perform these online labs, as well as a desktop computer.
Luminol Synthesis Lab
1079 Words | 5 PagesThe chemiluminescence part of the experiment, we had to make four solutions labeled as ‘stock solution A, solution A, stock solution B, and solution B’. For the ‘stock solution A’ we put the luminol product, (0.242 g) in a 25 mL Erlenmeyer flask and dissolve it with 2 mL of 3M NaOH. Then we took 1 mL of the ‘stock solution A’ and diluted in 9 mL of water using a 50 mL beaker. Solution A. For the ‘stock solution B’ we mixed 4 mL of potassium ferricyanide solution and 4 mL of hydrogen peroxide solution using a 25 mL Erlenmeyer flask.
Bluestar Rhetorical Analysis
582 Words | 3 PagesHave you ever wonder how does a crime scene investigator, known as a CSI, discover blood spatter on different fabrics, which is not visible to the human eye? The key is bluestar. According to the article “Influence of Bluestar Reagent on Blood Spatter Stain of Different Fabrics” by Arnon Grafit, bluestar is a “luminol-based reagent that is applied by spraying on surface.” Not only that, but “it helps obtain DNA and to analyze spatters patterns. By analyzing the article the reader is able to understand how bluestar works through the rhetorical techniques used.
Christopher Vaughn Case Summary
978 Words | 4 PagesThere are different ways that prints can be developed in crime labs; by the use of traditional powders, fluorescent powders, chemicals, and superglue. They can be viewed under laser and UV lighting. When the finger print analysis was done on the magazine, Christopher Vaughn’s fingerprints did not show
Copper Reaction Lab Report
1280 Words | 6 PagesThe result is an exothermic reaction that dissolves the copper. As the copper is oxidized, there are two products: copper(II) nitrate solution and nitrogen dioxide. These can be seen the image below, the green liquid is the copper(II) nitrate solution and the red gas is nitrogen dioxide. 3Cu(s) + 2NO –(aq) + 8H+(aq) → 3Cu2+(aq) + 4H O(l) + 2NO(g) 32
Lizzie Borden Trial
1892 Words | 8 PagesA positive aspect of this is that forensic scientists only need a small amount of a sample to get the results they need (“Forensic Science” 12). These samples can come from many other forms of identification other than fingerprints and bloodstains. A few moderate examples include strands of hair, tiny beads of sweat, and a saliva specimen (“Forensic Science” 12). Forensic Science Technicians stated that “crime scene investigators may use tweezers, black lights, and specialized kits to identify and collect evidence.” They also stated that examining autopsies prove to be beneficial in a crime investigation (“Forensic Science Technicians”
Copper Cycle Lab Report
800 Words | 4 PagesCopper Cycle Lab Report Ameerah Alajmi Abstract: A specific amount of Copper will undergo several chemical reactions and then recovered as a solid copper. A and percent recovery will be calculated and sources of loss or gain will be determined. The percent recovery for this experiment was 20.46%.
Photosynthesis Lab Report
442 Words | 2 PagesDuring this week, we performed the Meiosis pipe cleaner project and completed worksheets pertaining to meiosis. Afterwards, we took notes on karyotyping and finished worksheets for it. Regarding the meiosis pipe cleaner project, it is similar to the mitosis project since the chromosomes have a specific color key to them. However, in the meiosis project, we incorporated alleles in the chromosomes, by representing them with tightly loop pipe cleaners around the legs.
Cyclohexanone Lab Report
1871 Words | 8 Pages3.1 ABSTRACT The intermolecular interactions in the N-methylformamide with acetophenone, cyclic ketones (cyclopentanone and cyclohexanone) binary liquid systems are studied in combined experimental and computational methodology. The speed of sound (u), density (ρ) and viscosity ( ) values are measured for binary mixtures of N-methylformamide with ketones over the entire range of mole fraction at temperatures T= (303.15 to 318.15) K, at atmospheric pressure. From the experimental results, the values of excess molar volume ( ), excess isentropic compressibility (κsE), deviation in viscosity (η) and excess Gibbs free energy of activation of viscous flow ( ) are evaluated. The experimental results indicate the intermolecular association between the binary liquid
Personal Narrative: A Career As A Forensic Chemist
405 Words | 2 PagesForensic chemists usually work in a laboratory setting and they often go standing for long periods of time with a lot of technical equipment. They must follow strict pressures when handling evidence. They also use scientific protocols to ensure the quality and reliability of tests and equipment. You must do your work as efficiently as you can but still get results that are accurate.
Unlocking Charm Research Paper
435 Words | 2 PagesThe wand-lighting charm is a charm we discussed in lesson one. The wand-lighting charm is a simple spell that does exactly that: lights the tip of your wand. It is believed to be invented by Levina Monkstanley sometime in the 18th century. The incantation for the wand-lighting charm is lumos, pronounced loo-mos. The wand-movement is as simple as it gets, as it 's just a single counter-clockwise loop.
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