consumer product used to shine‚ waterproof‚ and restore the appearance of leather shoes or boots‚ thereby extending the footwear’s life. In some regions—including New Zealand—"Nugget" is used as a common term for solid waxy shoe polish‚ as opposed to liquid shoe polishes. Various substances have been used as shoe polish for hundreds of years‚ starting with natural substances such as wax and tallow. Modern polish formulate were introduced early in the 20th century and some products from that era are
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3/16 Chem 322 Friday Partition Coefficient (Extraction) Lab for Benzoic Acid Reaction Mechanism: Purpose: The purpose of this particular lab was to demonstrate the difference in separation of Benzoic acid in water and Dichloromethane. Also the difference in separation of Benzoic acid in bicarbonate and Dichloromethane. By calculating the partition coefficient for each of these separations‚ it became clear the differences in the separation of the aqueous and organic layers. Observations
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Table 8.1- Combustion of magnesium ribbon Observations Reaction was exothermic; magnesium ribbon burned and was glowing a bright white color when ignited. Reactants: Mg and O2 Products: MgO Balanced chemical equation 2Mg + O2 2MgO Table 8.2- Combustion of heptane Observations When holding test tube inverted over heptane flame‚ condensation formed against top walls of the test tube. When the burning splint was added the walls of the test tube became less foggy from the condensation
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destructive nature. I will start by describing the carbon cycle and how elements of my lifestyle impact the cycle. Photosynthesis converts the Carbon dioxide gas that exists in the atmosphere and in dissolved water to organic carbon. Organic carbon is brought back into carbon dioxide gas by a process called respiration. There are sources of organic carbon underground in the form of fossil fuels‚ human emissions and volcanic activity brings the stored carbon back into the cycle. As a human being who feed
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du17.3 Million Filipino Adults Are Current Tobacco Smokers Twenty-eight percent or 17.3 million Filipino adults age 15 years and older are current tobacco smokers‚ according to the results of the 2009 Global Adult Tobacco Survey (GATS). Almost half (48 percent or 14.6 million) of adult males and 9 percent (2.8 million) of adult females are current smokers. Moreover‚ 23 percent of Filipino adults are daily tobacco smokers: 38 percent for males and 7 percent for females. Filipinos mainly smoke
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082g Total Recrystallized Product Mass: 0.863g Crude Percent Yield: 67% Recrystallized Percent Yield: 18.7% Crude Melting Point Range: 53°-96°C Recrystallized Product Melting Point Range: 70°-113°C All starting materials were clear colorless liquids. Upon mixing‚ solution turned yellow and yellow precipitate began to form. Mixture smells like cherries. Calculations: Conclusion: The reaction is first created by adding 4.2 mL of NaOH and 4.1 mL of Ethanol into a beaker. About 3 mL of
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chemicals before use. Abide by specific warnings and directions. 3. Collect all materials needed for a procedure before proceeding. 4. Perform reactions under the hood when directed. Chemicals may be weighed and prepared at balance or lab tables‚ but tests should be carried out under the hood. 5.Acids and caustic chemicals are stored in the hood. Please do not take these chemicals from the hood. Procedure: PART 1: Metathetical reactions Precipitation reactions A1. Add a
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EXPERIMENT I Photoreduction of Benzophenone Introduction The study of chemical reactions‚ isomerizations and physical behavior that may occur under the influence of visible and/or ultraviolet light is called Photochemistry. The fundamental principles for understanding photochemical transformations are that light must be absorbed by a compound in order for a photochemical reaction to take place‚ and that for each photon of light absorbed by a chemical system only one molecule is activated for
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Experiment 4: Qualitative Analysis of Cations and Precipitation Reactions The overall goal of experiment four was to determine the identity of unknown cations presented to the student. But in order to know the identity of these unknowns‚ in part 1‚ Ag+‚ Pb+‚ and Hg22+ were presented to the student in aqueous solutions and then precipitated through experimentation. In part 2‚ the same procedure was enacted to determine which substances precipitated through qualitative analysis. Solubility rules
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one form. Carbon is one of the elements that contain many allotropes. Each allotrope of carbon has its own different properties. The allotropes of carbon are diamond‚ graphite‚ fullerenes‚ carbon nanotubes‚ carbon nanobuds‚ amorphous carbon‚ glassy carbon‚ lonsdaleite‚ and carbon nanofoam. Diamond is the best know allotrope of carbon. It is the hardest known natural mineral which makes it very rough. In the structure of the diamond‚ each carbon atom is covalently bonded to four other carbon atoms and
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