A qualitative analysis experiment was conducted to determine the identity of an unknown aldehyde or ketone. The tests include a Tollens test‚ a Schiff test‚ an iodoform test‚ and a derivative melting point test. The data of the first three tests was inconclusive. The final derivative melting point test was utilized to successfully determine that the unknown was the ketone‚ Propiophenone. Introduction: Qualitative analysis is a method or series of methods used to determine the identity
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Casting Pattern » Mold » Pour » Cool » Remove » Inspect Types of Casting : Expendable Mold‚ Multiple Use Mold Sand Casting : Expendable Mold casting process uses sand as molding material Requirements • • • • • • Mold : single or multiple use Melting Process Pouring Technique Solidification Process Mold removal Clean‚ Finish‚ Inspection METAL CASTING PROCESSES Categories • Expendable mold processes - mold is sacrificed to remove part • Mold (Sand‚ Shell‚ Vacuum‚ Expanded Polystyrene‚ Investment
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TITLE PAGE PREPARATION AND CHARACTERIZATION OF SODIUM SALICYLATE OINTMENT INTENDED FOR TOPICAL AND SYSTEMIC DELIVERY BY MUOBIKE MAKUO 2005/136609 IN PARTIAL FULFILLMENT OF THE REQUIREMENT FOR THE AWARD OF DEGREE OF BACHELOR OF PHARMACY (B. PHARM) OF THE UNIVERSITY OF NIGERIA‚ NSUKKA. DEPARTMENT OF PHARMACEUTICAL TECHNOLOGY FACULTY OF PHARMACEUTICAL SCIENCES UNIVERSITY OF NIGERIA‚ NSUKKA. PROJECT SUPERVISOR: DR. I. V. ONYISHI OCTOBER‚ 2012. APPROVAL PAGE This is to certify
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expected to compete with traditional petroleum-produced polymers. The production of Polyhydroxybutyrate is well known in the medical field as it is mainly used for surgical pins and internal suture due to its biocompatibility. It has a high melting point with about 175C‚ which makes the material compatible as containers with high temperature usage. These properties of being biodegradable meaning its products decompose naturally without surgery needed to remove‚ and biocompatible meaning the body
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Unit C2‚ C2.2.3 Covalent structures 1. This drill contains an electric motor. The diagram below shows the main parts of an electric motor. The carbon contacts are made of graphite. Springs push the contacts against the copper ring. The contacts conduct electricity to the copper ring. The copper ring rotates rapidly but does not stick or become worn because the graphite is soft and slippery. Graphite has properties which are ideal for making the contacts in an electric motor. Explain
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temperature Step 8: Cooled the solution in an ice bath for 5 minutes Step 9: Collected the crystalized solid by vacuum filtration Step 10: Measured the melting point for the crystalize solid Reagent Table: Table 1: The chemicals and properties used in the reaction Compound Quantity Molar Mass (g/mol) Melting Point (C) Boiling Point (C) Anthracene 0.5g 178.23 216-218 340 Maleic Anhydride 0.25g 98.06 54-56 200 Potassium Bromide 100 119 63.38 759 Xylene 6mL 106.17
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% by volume of the fat‚ a nitrogencylinder With flowmeter is connected to suction of feed pump 40 3-5 Crystallization System ( Refrigeration Load : 1T/ HR-50 TR) Average Composition of a General purpose Bakery Fat : High Melting Point Middle Melting Point Lower Melting Point Til Oil (Sesame) 43-44ºC 35-36ºC 28-30ºC 50% 35% 12% 3% 100% Equipment Fat Temp ºC RPM Residence In Out Time Seconds Performer I 47+2 34+2 400-500 20 Performer II 34+2 24+1 400-500 20 Maturator I 24+1 28+1 175-200 90-180
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The literature value for the melting point range for Trans-9-(2-phenylethenyl)anthracene is 130-133 oC. The obtained range was lower than that at 120.3 to 123.8 oC. Because it is lower than the known value‚ this means the obtain product is not completely pure. Impurities in the compound can result in a decrease in the compounds melting point‚ which is observed here. The impurities could be 1-propanol due to an insufficient drying. If the experiment was performed again‚ the product would need to be
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by Actual yield of synthesised aspirin: 0.347g 0.347/1.196 * 100= 29 Percentage yield: 29% Melting Points Compound Began Melting (°C) Totally Melted (°C) Range (°C) Pure Aspirin 136 1-2 Crude Aspirin 125 130 5 Product from Willow Bark 120 125 5 The documented melting point for pure aspirin is 136°C. An impure compound will exhibit a lower melting point than this‚ which is what was observed in both the willow bark product and the crude aspirin. Pure aspirin has a narrow
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completes the statement or answers the question. ____ 11. The phase change that is the reverse of sublimation is a. deposition c. condensation. b. vaporization. d. melting. ____ 12. The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is a. melting. c. deposition. b. sublimation. d. vaporization. ____ 13. If a solid piece of naphthalene is heated and remains at 80°C until it is completely melted‚ you know that
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