Radio active safety : Protective Clothing: Wear latex or nitrile gloves with along with the full-length lab coat including the closed toed shoes. Wear safety glasses to avoid the exposure radioactive material. Introduction : Chemicals may be liquids‚ gases‚ solids or powders have the tendency to harm health when it used or handled improperly‚ those can be corrosive‚ toxic agents‚ reactive or flammables can generate fumes‚ vapors‚ dust and mists. Depending on the usage and the work it can enter the
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1 Introduction 1.1 DEFINING POLYMERS Polymers are materials of very high molecular weight that are found to have multifarious applications in our modern society. They usually consist of several structural units bound together by covalent bonds [1‚2]. For example‚ polyethylene is a long-chain polymer and is represented by ÀCH2 CH2 CH2 À or ½ÀCH2 CH2 Àn ð1:1:1Þ where the structural (or repeat) unit is ÀCH2ÀCH2À and n represents the chain length of the polymer. Polymers are
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CHAPTER 4 RESULTS AND DISCUSSION 4.1 Percentage yield Fresh leaves of C. nardus with 1 kg portion yielded about 22.57g of aqueous crude extract‚ which was approximately about 2.26% of yield. The result showed that fresh leaves had a higher percentage yield compared to the air-dried leaves‚ it was only 1.3% yield which conducted by Koba et al. (2009) with the similar extraction technique. There were other factors that might affect the percentage yield‚ such as influence of the harvest place
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ABSTRACT At First my heartiest air towards to ALLAH‚ then thanks to our course teacher Mr.Rajib saha who give me chance to work regarding Detergent. A detergent is an agent used for cleaning. Detergents are synthetic surfactants‚ which is produced from petrochemicals rather than fatty acids and oils. They are very effective in hard‚ soft as well as salt water. Detergents are the salts of long chain of hydrocarbons such as alkyl sulphates. A detergent has several advantages over soaps in which we
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solution leaked out of the cap‚ which may account for the loss of completely recovering this compound because only 39.3% of ethyl 4-aminobenzoate was recovered. For the recovery of benzoic acid‚ NaOH was added to convert the carboxylic acid of the benzene to the water-soluble benzoate anion‚ which dissolves in the aqueous NaOH solution while the non-acidic impurities remain in the organic phase. After separating the aqueous layer into an Erlenmeyer flask‚ the basic solution of sodium benzoate was acidified
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Abstract: The goal of this experiment was to synthesize aspirin. In this experiment aspirin‚ also known as acetylsalicylic acid‚ was synthesized from salicylic acid and acetic anhydride. In the reaction the hydroxyl group on the benzene ring in salicylic acid reacted with acetic anhydride to form an ester functional group. This method of forming acetylsalicylic acid is an esterification reaction. Since this esterification reaction is not spontaneous‚ sulfuric acid was used as a catalyst to initiate
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Perchloric acid Mercuric acetate TS Crystal violet TS 2 Cl- + Hg (OAC)2 + 2HClO4 2 ClO4- + 2HOAc + 2HgCl2 Assay of Phenytoin Non Aqueous alkalimetry Blank titration Sodium methoxide Saturated sol’n of Azo violet in Benzene H C6H5 N--C=O C C6H5 C-NH + CH3O- O C6H5 N=C-O C C6H5 C-NH + CH3OH O OXIDATION-REDUCTION REACTION OXIDATION-REDUCTION REACTION: IODIMETRIC
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Assistant : Chandan Dey Sciences II – lab. A Nitration of bromobenzene (n°28) 1. INTRODUCTION 1.1) 1.2) Purpose The objective of this experiment is to synthesize the p‐bromonitrobenzene (bromo‐1‐nitro‐4‐benzene) out of bromobenzene‚ by nitration. Scheme Br Br HNO3 / H2SO4 Mechanism The first step is the formation of the NO2 from the nitric acid: NO2 1.3) O O S N HO O O HO O N + H2O + HSO4-
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an organic chemical compound and essential oil commonly extracted from dill weed‚ though it can be found in a variety of other plants such as fennel root. This compound is closely related to apiole‚ having amethoxy group positioned differently on the benzene ring. Vinegar is a liquid consisting mainly of acetic acid (CH3COOH) and water. The acetic acid is produced by the fermentation of ethanol by acetic acid bacteria. Vinegar is now mainly used as a cooking ingredient‚ but historically‚ as the most
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