Date Performed: January 10 & 15‚ 2013 Spectrophotometric Determination of the Equilibrium Constant of a Reaction R.J.V. Ortega and J.C.V. Gatdula Institute of Chemistry‚ College of Science University of the Philippines‚ Diliman‚ Quezon City‚ Philippines Received January 22‚ 2013 ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- ABSTRACT -------------------------------------------------
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+ H2SO4 - produced a sweet smell Hydroxamic acid test for the Ester group Ethyl acetate in ether + NH2OH.HCl + KOH heat effervescence + alcoholic HCl + FeCl3 – red colored solution Hydrolysis of acid derivatives H2O + Acetic anhydride 2-immiscible layer formed‚ blue litmus paper turned red‚ test tube becomes warm as the reaction took longer time Pinch of benzamide + NaOH Red litmus paper turned blue III. DISCUSSION INTRODUCTION Some tests was conducted with carboxylic
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Amrita VISHWA VIDYAPEETHAM (University established u/s 3 of UGC Act 1956) Amrita Entrance Examination – Engineering PHYSICS‚ CHEMISTRY & MATHEMATICS Question booklet Version Code Question booklet no. Number of pages Number of questions Time 120 : 3 hrs Max. Marks : 360 Registration number Name of the candidate Signature of the candidate INSTRUCTIONS TO THE CANDIDATES GENERAL 1. Any malpractice or attempt to commit malpractice in the examination hall will lead
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concentration and after concentrating all fractions of these concentrations‚ approximately 7 to 8 mg of quercetin was obtained. 4.2 Thin layer chromatography TLC profiles were carried out for the fractions‚ performed using the solvent mixture of toluene: ethyl acetate: methanol in the ratio of 5:3:2 (v/v/v) and this mobile phase enabled excellent separation of the bioactive compound. The results showed that there was good amount of correlation between the standard quercetin band and the band of bioactive
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Aspirin Background Aspirin Aspirin‚ or acetylsalicylic acid (ASA) is a salicylate drug‚ and is generally used as an analgesic (something that relieves pain without producing anaesthesia or loss of consciousness) for minor aches and pains‚ to reduce fever (an antipyretic)‚ and also as an anti-inflammatory drug. Aspirin works by prohibiting biological substances such as prostaglandins. Many different prostaglandins exist in the human body each serving a plethora of physical functions.
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recrystallization. We will then record the products’ melting point and calculate the yield in order to determine the degree of purity of the aspirin sample. Diagrammatic scheme for the reaction: OBSERVATIONS: When 5g of salicylic acid‚ 7.5 cm3 of ethanoic anhydride and 3 drops of concentrated sulphuric acid were mixed‚ a white milky solution was formed. This solution was heated and a yellow liquid formed. 75 cm3 of distilled water was added and the yellow liquid became cloudy with white precipitates visible
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contain petroleum-based by products of the oil industry • The main uses of paints and varnishes are for architectural use (e.g. DIY)‚ industrial use and automotive use. • VOCs may be released during use. • Some paints can emit noxious gases such as toluene and xylene‚ which are known carcinogens. Manufacture Waste Management/Disposal • The main components of the manufacture process are synthesis in a reactor‚ filtration‚ blending with other additives and packaging Paint related waste is often categorised
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plasmids such as the TOL and OCT plasmid. Besides that‚ it has a circular genome where around eighty genes in oxidative reductase can be found. All these three components found in Pseudomonas putida are important in bioremediation such as degrade toluene and in the application to biotechnology. Pseudomonas putida plays an important role in degradation of pollutants in environment. It has the ability to produce Poly-3-hydroxyalkanoates (PHA) from aromatic hydrocarbon styrene‚ which is a major environment
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itself to 92 percent but it is implemented only in seven states. Secondly ‚bottled water damage humans health. These bottles are made in refineries . 700 million gallons of oil used to make plastic bottles. These bottles have chemicals like benzene‚ toluene‚ BPA and many more. These chemicals lead human to the diseases like cancer ‚ diabetes‚ brain disorder etc. The people who live near those refineries are suffering from sure diseases like skin problems and breathing problems. Also the birth defect
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certain lipids called fats or oil. For this lab‚ students are testing the properties and reactions of lipids and soap will be prepared and its properties will be tested. To begin the experiment‚ place 5 mls of water‚ ethyl alcohol‚ chloroform‚ and toluene in to four clean test tubes and add 1 drops of cottonseed oil to each test tube. Shake it and record your observation. To do part B‚ in three test tube‚ place 5 mls of water and one drop of cottonseed oil. Then‚ add 3 mls of soap solution to one of
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