Investigation and Preparation of Esterification Lab Introduction Esters are classified as organic compounds commonly derived from carboxylic acids. They are compounded from the reaction of a carboxylic acid with an alcohol in the presence of a strong acid to be used as a catalyst. The formula that represents an ester is R-COO-R where both Rs’ are alkyl groups‚ one which is bonded to an oxygen‚ and the other to a carbon which is double bonded to 1 oxygen and single bonded to the other. Esters
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Flame Lab Objective: How an electron absorbs energy and re-emits it as light and why different elements have different spectra. Also to learn how to use flame tests to determine the identity of unknown mixtures. Hypothesis: We know that certain compounds will burn certain flame colors because they emit different wave lengths. Introduction: Neils Bohr made the “Bohr’s Model” in 1922‚ he found that electron travel in specified fields – which‚ when excited‚ will jump to different rings
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Unit 5 Assignment 5.3 Implementing Comprehensive Human Resources Risk Management Plan Human resources policies and practices should reduce the human risk factors in information technology IT security and information access controls. Decrease the risk of theft‚ fraud or misuse of information facilities by employees‚ contractors and third-party users. The organization’s human resources policies taken as a whole‚ should extend to all the persons within and external to the organization that do or may
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Renee Alyanna de Leon IV- St. Arnold Janssen The island province of Bohol reinvigorates its tourism promotion with a campaign that is said to “go deep into the roots emotionally.” Its local government recently launched a tourism campaign with the slogan “Bohol: Heart the Islands‚ Truly Philippines.” The slogan points out that the island is at the center of the Philippines‚ being in the Central Visayas Region and Visayas being at the center of the country. It is also usually projected as a truly
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distinguish between chemical and physical changes. Materials: - lab balance - microspatula - lab burner - dropper pipet - 5 test tubes - mortar and pestle - test tube rack - magnet - test tube holder - insulating pad - watch glass - safety goggles - glass square - lab apron or coat - copper sulfate pentahydrate - iron fillings - sodium chloride - magnesium ribbon - hydrochloric acid - paper (5 cm x 10 cm) - silver nitarate - birthday candle - sulfur
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A Proposal on Solid Waste Management And Disposal in Dhankuta Municipality Submitted By: Atit Shrestha MSWSHD/068/901 Department of Civil Engineering 1 Background of landfill technology Until recently‚ the concept of land filling was used to dump waste material for disposal. Therefore‚ not much care was taken about their construction. Placing the waste in the Earth’s upper crust was considered as the safest practice of waste disposal. But with rapid industrialization
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separated by physical means‚ and consequently‚ the components underwent physical changes. A physical change is a change‚ such as a phase change‚ that occurs with no change in chemical composition.1 The main concept being applied and studied in this lab was the separation of components of mixtures by physical means‚
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PRE LAB REPORT Reynaldo Riboul TLC and Column Chromatography October 6‚ 2013 Table of Chemicals: Chemical Hazards Mol. Wt. Density Grams Moles Acetone Flammable‚ Irritant 58.08 g mol−1 0.791 g cm−3 2.0 g 0.0344 Hexane Flammable‚ Irritant‚ Dangerous to Environment 86.18 g mol−1 .6548 g mL−1 9.0 g 0.1044 Fluorene Very toxic to aquatic life with long lasting effects 166.223 g/mol 1.202 g/mL 0.3 g 0.00180 Fluorenone Irritant 180.20 g mol−1 1.13 g/cm3 0.3 g 0.00166
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condition‚ the dye will remain easily identifiable as a solid core. Transitional Flow‚ 2000 < Re < 4000 Transitional flow is a mixture of laminar and turbulent flow‚ with turbulence in the
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Partner: Camille Dupiton Lab #1 Purification of a Solid: Crystallization and Melting Point Section: A61 Laboratory Exercise #1 Purification of a Solid: Crystallization and Melting Point Introduction In this lab exercise‚ we will be learning experimental techniques using glassware and other apparatuses. In order to successfully complete this lab‚ we will use techniques 1.0‚ 1.1‚1.2‚2.0‚2.1‚2.2‚ and 2.3 that are described in the Lab Manuel. In addition‚ we will
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