around .860 g. Gravity filtration was then used to filter the mixture into a 125 mL collecting flask. The mixture was filtered in order to separate the crude sucrose from the mixture. The original container was then rinsed through the filter paper again with 5 mL of DCM and the mass of filter paper containing sucrose was measured after it was dry. The last step was to perform the isolation of Aspirin. See image below. Part B The mixture of DCM and Panacetin were poured from the collecting flask
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The reaction mixture was stood for an additional 15 minutes to allow reaction to proceed to completion. 6.The reaction mixture was poured onto about 10g of crushed ice in a beaker. 7.The product was isolated by vacuum filtration. The solid with a tiny amount of ice cold 50% methanol(mixture 1:1 methanol-water). 8.The crude product was recrystallized using methanol as the recrystallization solvent. 9
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obtain a uniform mixture in each cylinder. The various cylinders receive the airgasoline mixture in varying quantities and richness. This problem is called the maldistribution and can be solved by the port injection system by having the same amount of gasoline injected at each intake manifold. By adopting gasoline injection each cylinder can get the same richness of the air-gasoline mixture and the mal-distribution can be avoided to a great extent. 2 Typical pattern of mixture distribution
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2mole) of acetylacetone‚ these were added to an 100ml Erlenmeyer flask and were stirred with a glass stirring rod to produce the slurry. The mixture was then heated to 100°C on a hot plate the temperature was measured using a thermometer placed directly into the slurry. The mixture was removed from the heat and hydrogen peroxide was added directly to the mixture at a rate of 2ml/min ensuring that the solution did not bubble over from the hydrogen peroxide being added in
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ABSTRACT The study aims to produce biodegradable plastic using cassava starch as its main component. Cassava starch was mixed with water‚ epoxydized soya beanoil (ESBO)‚ glycerol‚ and polyvinyl alcohol (PVA). The mixture was then compressed and tested. Three preparations were made from the mixture. The first preparation contained 50 grams starch‚ 50 grams water‚ 50 grams PVA‚ 2.5 grams ESBO‚ and 2.5 grams glycerol. The second preparation contained 65 grams starch‚ 65 grams water‚ 50 grams PVA‚ 2.5 grams
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The different compounds in a mixture have different boiling points‚ the two solutions separate into individual components when the mixture is carefully distilled by using fractional distillation. Problems 1. (a) What is the composition and temperature of the azeotrope? The composition of the azeotrope is 70% water and 30% formic acid. (b) What is the boiling point of the mixture when Xformic acid = 0.40? The boiling point of the mixture when Xformic acid = 0.40 is 105C. (c)
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Oxidation of the porphyrinogen during the reaction yields the porphyrin .Usually porphyrins are purified by column chromatography often traditional halogenated solvents. However in this green chemistry experiment‚ a safer chromatography solvent mixture (hexanes and ethyl acetate) is used to help with the avoidance of solvent usage‚ the use of solid supported reactions and the use of alternative energy sources. Materials & Methods * 0.43ml of Benzaldehyde 0.30ml of pyrrole * 0
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CALORIMETRY Abstract: During the experiment‚ the group were able to perform the following objectives; to compute the heat capacity of a Styrofoam-cup calorimeter‚ and also to compute the heat of neutralization of 1.0 M hydrochloric acid and 1.0 M sodium hydroxide‚ the heat of dilution of concentrated sulfuric acid‚ and the heat of solution of solid ammonium chloride The sixth experiment was named "Calorimetry" wherein it is the measurement of how much heat is gained or released by a system
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This work presents the results of a comparative study of the sorptivity‚ accomplished in mixtures of selfcompacting concrete with different types of additives and a normal concrete compacted by vibration. The self-compacting concrete mixtures present slump-flow of 650 ± 50 mm and have the same cement contents. In the self-compacting mixtures‚ were used as additives‚ fly ash‚ silica fume‚ hydraulic lime and a mixture of fly ash and hydraulic lime. A modified carboxylates superplasticiser was used to obtain
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GOVERNMENT OF TAMILNADU STANDARD NINE TERM I VOLUME 3 SCIENCE SOCIAL SCIENCE NOT FOR SALE Untouchability is Inhuman and a Crime A Publication Under Free Textbook Programme of Government of Tamilnadu Department of School Education © Government of Tamilnadu First Edition - 2013 (Published under Uniform System of School Education Scheme in Trimester Pattern) Textbook Prepared and Compiled by State Council of Educational Research and Training College Road‚ Chennai - 600
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