CHM151LL Laboratory Report Form Fall 2011 Title: Project 5: SPECTROPHOTOMETRIC ANALYSIS OF A PENNY Date Run: 04/03/2012 Date Submitted: 04/15/2012 Grade: _____________________ Objectives: The purpose of this experiment is to use spectrophotometry to determine the percentage of copper in a copper-clad penny‚ and to determine the thickness of copper layer on the copper-clad penny. Introduction: In the spectrophotometric analysis of a penny lab‚ we will be conducting three
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Enzyme Lab Report Introduction: Enzymes are proteins that enable chemical reactions. In the enzyme lab‚ the effects of concentration‚ temperature and pH on the functionality of the enzyme catalase. The enzyme lab was also about measuring reactions by capturing the oxygen that was generated by the reaction. Materials and Methods: Experiment 1‚ 2‚ & 3 Experiment 1 examined the effects of concentration on catalase activity. Experiment 2 examined the effects of concentration in temperature
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Introduction: Mitosis occurs in all eukaryotic cell tissues and produces genetically identical daughter cells with a complete set of chromosomes. In humans‚ mitosis produces somatic cells that are diploid‚ which means they contain two non-identical copies of each of the twenty-three chromosomes. One copy is derived from the person’s mother and the other from the person’s father. Meiosis‚ on the other hand‚ occurs only in testis and ovary tissues‚ producing sperm and ova (eggs). The gametes that
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Post lab The unknown solution 4055 was tested by the separation scheme in order to identify the four cations that exist in it. The cations found were Ag+‚ Ba2+‚ Mn2+‚ and Ni2+. When I added 5 drops of 3M NaCl to the unknown solution‚ we had some precipitate‚ we centrifuge and then we divided to two test tubes‚ and they were put in hot water and got confirmatory tested. The Ag+ appeared to be in the solution because it melted‚ however Pb2+ didn’t. With the rest of the solution we added Na2SO4 we had
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soil from the site and then take several other samples from different points on the site. This ensures variety of soil to ensure that all the site is safe‚ not just a small area where you would have taken your first sample from. I will return to the lab with the samples of soil I have extracted from the site. Here I will make a solution from the samples in order to carry out the identification tests. In order to turn my soil samples
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To what extent does varying the Sodium Chloride concentration impact the mass change of Solanum tuberosum cubes? Katie Hynek 12/11/15 Personal Engagement: Every Thanksgiving my aunt and grandma switch off making mashed potatoes and every year they use the same recipe. This year it was my aunt’s turn and when we went to eat the mashed potatoes they were super salty. After thanksgiving dinner that year I became interested in figuring out how the using the same recipes the outcome could be so different
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The results did not support this hypothesis. It has been established that heart rate in Daphnia magna increases when there is a progressive lack of oxygen present. (Baumer et.al 2002). When the salinity of water increases there are increases in Na+ ions as well as Cl- ions. This increase
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Effects of Temperature‚ pH‚ Boiling‚ and Hydroxylamine on the Enzyme Peroxidase Extracted From Brassica rapa Abstract In this experiment the enzyme peroxidase was extracted from from a turnip‚ Brassica rapa‚ and tested under different conditions. The effects of temperature‚ boiling‚ pH‚ and a competitive inhibitor were tested. The enzyme was tested at temperatures of 4°C‚ 24°C‚ 32°C‚ and 48°C. As the temperature increased‚ so did the activity of the enzyme
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Introduction In this lab‚ we experimented the effects of pH on the function of the enzyme catalase. Catalase is an enzyme that brings about the reaction by which hydrogen peroxide is decomposed to water and oxygen (Encyclopedia Britannica). The chemical reaction is shown as 2H2O2 = 2H2O + O2 (Keilin and Hartree 397). The reaction involves primarily the adsorption of hydrogen peroxide at the catalase surface. The decomposition of hydrogen peroxide by catalase is regarded as involving
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results from a prior experiment my supervisor Ms. Ehnar Jiy conducted. In this lab‚ i wanted to know if more active cells in our bodies require more energy. I started of by taking five samples of three different types of cell (skin cell‚ muscle cell and lung cell) and counted the mitochondria present in each by viewing the cells under a powerful optical microscope. According to my data‚ i found out that my hypothesis was accurate‚ i predicted that more active cells in our bodies require more energy
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