collected for regeneration. Soxhlet extraction for adsorbent regeneration Two boiling chips are added into the flat bottom flask and weighed. Then‚ hexane is poured into the flat bottom flask until it is half full. Teflon tape is applied on the bottom end of siphon and condenser before fitting the apparatus. This is to prevent the released of hexane gas during the experiment. The wrapped adsorbent is then placed inside the thimble before putting it over the soxhlet extractor for extraction. Vertical
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technique for separating and/or identifying the components in a mixture. There are different types of chromatography and each has its own strengths and weaknesses. In this experiment‚ pigments of the chili pepper were extracted with the use of hexane‚ hexane-DCM‚ DCM‚ and DCM with methanol; then‚ the extract was introduced into the column and eluate were collected‚ this process is the column chromatography (CC). The purity of the components was determined by using the thin layer chromatography (TLC)
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rectangular solid‚ aluminum foil ~10 x 10cm‚ 100-mL graduated cylinder‚ rectangle Materials: Methylene chloride‚ hexane‚ water‚ ice‚ unknown liquids Observations: A) Procedure Observations Water added to cylinder Water fills the cylinder. Methylene chloride added to water A layer of methylene chloride forms below the water. Hexane added to water Layer of hexane forms on top of the water. Glass marble added to cylinder Glass marble sanks to the bottom of the cylinder
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Physical Chemistry CHM2330 Experiment F- Raoult ’s Law Experiment By: Sanah Assaad Student Number: 5267864 Partner: Jihad Arafa T.A: Didier University of Ottawa March 25‚ 2010 Objective: The purpose of this experiment is to study the total vapour pressure of ideal or non-ideal mixtures of two volatile liquids as a function of chemical composition. Introduction: For ideal mixtures of volatile liquids the vapour pressure of any given mixture may be obtained by applying Raoult
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Lab 3: Solubility of Organic Compounds Objectives: Understanding the relative solubility of organic compounds in various solvents. Exploration of the effect of polar groups on a nonpolar hydrocarbon skeleton. Introduction: The solubility of a solute (a dissolved substance) in a solvent (the dissolving medium) is the most important chemical principle underlying three major techniques you will study in the organic chemistry laboratory: crystallization‚ extraction‚ and chromatography.
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Results: 1) Complete the following table by rating the solubility of each organic compound in the indicated solvents either as soluble‚ partially soluble‚ or insoluble. (9 Points) Organic Compound Water (solvent) Methyl alcohol (solvent) Hexane (solvent) Benzophenone Malonic Acid Biphenyl 2) There should be a difference in the results between the solubilities of biphenyl and benzophenone in methyl alcohol. Explain why there is this difference. If
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spotting the standard spinach extract. A beaker was used with the developing solvent‚ filter paper‚ and TLC plate inside and a watch glass over top of the beaker to perform the thin layer chromatography. After the solvent front (30% ethyl acetate in hexane) reached about an inch from the top‚ the TLC plate was removed from the beaker and the developing spots were marked. After implementing the column and thin layer chromatography‚ the Rf value for component one was .95‚ for component two it was .28
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Use of Ionic liquids in Industrial Applications Samar Noureldin ‚ Amel Elsadig ‚ Mohammed Mahjob Department of Chemical engineering ‚ University of Khartoum‚ Sudan Paper of 4th grade project ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
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calcium chloride pellets with more DCM‚ the solvent was evaporated‚ leaving greenish-white crystalline caffeine residue weighing about .25 mg. In order to recrystallize the caffeine‚ we used a mixed-solvent method‚ consisting of hot acetone and hexanes. The solution was cooled and a vacuum filtration was done to remove the caffeine crystals. The final product weighed about 3 mg. Introduction Caffeine is an organic compound that is found in tea leaves and coffee beans. It is a basic substance
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solution (5 mL) again. Dry the organic layer with anhydrous sodium sulfate. Decant the organic layer into a small beaker and concentrate to roughly 0.2 mL by evaporation in the hood (do not apply heat!). If the sample goes to dryness‚ re-dissolve in hexane (0.2 mL). *Set aside a small amount of your crude
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