be isopentyl acetate. Materials and Methods Apparatus 4 test tubes Test tube rack Graduated cylinder (10 mL) 150 mL beaker 250 mL beakers (2) Hot plate Thermometer Safety glasses Beaker tongs Test tube holder Reagents Methanol Methyl-2-propanol 1-pentanol 1-octanol Acetic acid Formic acid (methanoic acid) Salicylic acid Concentrated sulfuric acid (H2SO4) Procedure 1. We labeled the four test tubes A to D and placed them in the test tube rack. 2. Into the
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when bonds are made than broken than with methane 5. Calculate the enthalpy change from an experiment in kJmol-1. a. e.g. the temp of 100g of water rose by 12 degrees C when 1g of methanol was completely combusted. The specific heat capacity of water is 4.2 Jg-1K-1 ∆H = - 100 X 4.2 X 12 / 1/32 (/ moles methanol) then / 1000 = - 161 kJ mol-1 6. State Hess’s law and use a Hess’s law cycle to find ΔHθf of CH4 if given the ΔHθc of C ‚ ΔHθcH2.and ΔHθc CH4 a. Hint : first
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Department estimated in the 1920s‚ manufacturers of illegal alcohol were stealing about 60 million gallons of industrial alcohol each year. To combat this‚ government required the addition of methanol to discourage bootleggers (illegal alcohol-makers) from using ethanol in the manufacturing process. Methanol is highly toxic‚ but desperate alcoholics would still drink the resulting products with lethal results. Illegal suppliers preferred more concentrated products like whisky and spirits rather than
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Grignard reaction‚ a carbon-carbon bond was formed‚ thereby resulting in the formation of triphenylmethanol from phenyl magnesium bromide and benzophenone. A recrystallization was performed to purify the Grignard product by dissolving the product in methanol. From here‚ a melting point range of 147.0 °C to 150.8 °C was obtained. The purified product yielded an IR spectrum with major peaks of 3471.82 cm-1‚ 3060.90 cm-1‚ 1597.38 cm-1‚ and 1489.64 cm-1‚ which helped to testify whether the identity of the
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Results and Discussion A. Table of Result of Extraction Weight (g) Tea Leaves 5.5783 Crude Caffeine 0.0246 Empty Beaker 117.5350 Beaker + Crude Caffeine 117.5596 The table above shows the weight of the sample tea leaves‚ the crude caffeine content in the sample‚ the empty beaker used in the extraction‚ and the beaker with the crude caffeine. It is induced from there that for that amount of sample tea leaves‚ which is equivalent to three bags of Nature’s Pride Tea; there is a 0.0246
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flavonoids fraction of Cajanus cajan (FFCC) The Cajanus cajan L. seeds were air dried at 10% moisture‚ then powdered and preserved in a refrigerator at -80°C. Five hundred gm from the powdered seeds were defatted with hexane‚ then extracted with methanol (MeOH - 70%) four times‚ then concentrated under vacuum to yield 37 g. Polyamide and sephadex LH-20 chromatography columns were used to fraction the MeOH (70%) extract of Cajanus cajan. Seven flavonoid fractions were collected and identified as follows:
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transformed into the Grignard compound and was then reacted with the benzophenone to make the final product. The mixture was then mixed with sulfuric acid and the organic layer was extracted via a separatory funnel. The mixture was then recrystallized from methanol and was allowed to dry and the percent yield‚ melting point‚ and the IR was obtained. The mass of the product obtained was 5.45 grams and the percentage yield was determined to be 41.95%. The melting point range obtained from the final product was
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ASSIGNMENT on GEO-SEQUESTRATION M.Sc.(tech.) Environmental Science & Technology (CEST) RAJIV GANDHI SOUTH CAMPUS BARKACHHA MIRZAPUR BANARAS HINDU UNIVERSITY SUPERVISED BY: VIJAYKRISHNA SIR SUBMITTED BY: KAUSHIK KUMAR M.Sc.(tech.) 3rd SEM. CONTENT: 1. Introduction 2. Need for Geo-sequestration 3. CO2 Capture Methods 3.1 Post combustion process 3.2 Pre combustion process 3.3 Oxy-Fuel method 4. CO2 transport 5. CO2 storage 5.1 Geological storage 5.2 Ocean Storage 5.3 Mineral storage 6
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What’s in a Medicine? (WM) In this document you will find the following material to cover the new AS specification with your students. Notes for students and teachers Revised Chemical Ideas 13.4 part b Answers to problems for 13.4 part b Revised activity WM3 Answers to questions for revised activity WM3 Revised check your notes Revised map of the unit 2 3 6 7 9 10 11 WM © Harcourt Education Ltd 2004 Salters Advanced Chemistry These pages have been downloaded from www.heinemann.co.uk/science 1 Notes
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THE POTENCY OF TALISAY terminalia catappa AS FABRIC DYE By: Charlene Angelica B. Buenvenida Chapter I INTRODUCTION Dyes have become part of daily living. What’s great about dyes is that they give variety to everything. Even the earliest humans used dyes to put color into their worlds‚ and they even used the most peculiar sources of the colors. Since then‚ dyes have dominated different kinds of industries. Before‚ dye manufacturers were only able to produce one color at a time. But
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