Dina Karina Lab performed: 1/22/15 Chem 2203-012 Report due: 1/29/15 TA: Kavitha Akula Experiment 4A: Determination of a Partition Coefficient for Benzoic Acid in Methylene Chloride and Water‚ and Experiment 4B: Solvent Extraction I: Acid-Base Extraction Using the System Benzoic Acid‚ Methylene Chloride‚ and Sodium Bicarbonate Solution Objective The purpose of this experiment is to familiarize oneself with the general procedures determining a partition coefficient
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afford to carry large inventories.” With that advice‚ he needs to find a way to increase capacity while staying flexible and minimizing expense‚ which is much easier said than done. Increasing capacity is a challenge because of the weather affecting drying times as well as worker productivity so estimating how long it takes to make a finished product. The hot‚ humid summer days take a toll on workers and
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immediately‚ so it does not set. Do not rub. 4. Wash your clothes often. Separate colors from whites. 5. Try not to use a dryer at all. Dryers wear out clothes and fade their colors more quickly than drying in sunlight. Drying in sunlight or in the open air is also a much healthier way of drying clothes. Sunlight is a natural disinfectant. 6. Remove the clothes from the dryer and hang them up immediately. Button the top button shirts‚ and hang blouses neatly on the hanger. Slacks should go on
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also make water essential to the sustenance of life. These bonds give water a high specific heat but more importantly‚ they make water less dense as a solid. This happens because when water freezes‚ the hydrogen bonds freeze at “arm’s length”. Because ice is less dense‚ when bodies of water freeze‚ they freeze from the top down. This allows life to continue below the ice. The cohesive property of water also makes water essential to the sustenance of life. The cohesive property of water is when
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Solid-liquid extraction and liquid-liquid extraction of caffeine from tea leaves Andrew Jensen Lab partners: Jamie Pawluk‚ Joe Luong 230105559 Chem 250 L2 Oct‚4‚2012 Introduction: Extraction is the experimental procedure of obtaining a desired compound with the use of a solvent from either a liquid or solid mixture. Solid-liquid extraction involves the removal of organic compounds from solid material. This method of extraction may be achieved through extraction of the organic compound
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EXCAVATION‚ GRADING‚ AND FILL The primary section dealing with excavation‚ grading‚ and fill placement in the International Building Code is Section 1804. Other sections of the International Building Code that deal with excavation‚ grading‚ and fill compaction are as follows: * Special inspections (Section 1704.7). Special inspections for grading and fill compaction (site soil inspections) as presented in the International Building Code are summarized in Table 18.1 of this book. * Site work
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surrounding landscape but also contains species adapted to wetter conditions. Plants by vernal pools are often tolerant of flooding‚ soil saturation and drought. Vernal pool inhabitants have developed different strategies for coping with periodic drying of their wetland
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Date: 09-02-2013 Experiment 1(a) Laboratory determination of water (moisture) content of a soil sample by oven drying method Reference: ASTM D2216-98 Need and scope of the experiment: In almost all soil tests natural moisture content of the soil is to be determined. The knowledge of the natural moisture content is essential in all studies of soil mechanics. To sight a few‚ natural moisture content is used in determining the bearing capacity and settlement. The natural moisture content will
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1) 0.069 mol MgSO4/ 0.015 mol H2O = 4.6 = 5 Formulae for hydrated MgSO4 = MgSO4 5H2O 2) There are at least two reasons why heating to find percentage of water in hydrated crystals is not recommended for all hydrates. The first reason is that some hydrates have such a strong bond with the water that not all of it will be able to be removed. The second reason is that different hydrates have their own mass. Depending on the mass and type of hydrate‚ some of the molecule may be burned off from heating
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FOR IMMEDIATE RELEASE (Oakland‚ California) Many individuals cheered President Trump’s decision to put a hiring freeze in place for the federal government. Those doing so often fail to realize the far reaching effects of a decision like this. In fact‚ Bloomberg reports this freeze may make the current backlog for Social Security Disability Insurance Claims and Appeals even worse. Currently‚ the backlog stands at 526‚ but fewer employees could extend this time frame. Sadly‚ California leads the list
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