Most reactions produce a crude mixture of undesired reagent‚ byproducts‚ as well as the desired product. Extraction allows for the separation of a compound from a complex mixture. The different components can be eliminated by their different solubilities. Ultimately‚ through a simple distillation and filtration process‚ crystals of the desired product can be achieved. Table of Reagent: Structure Mw. m.p. b.p. d.(density) Nutmeg Methylene Chloride 84.9328 -96.7 39.8 1.3255 Acetone
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kind of lipid of lipid based on the chemical properties of its hydrolyzed products. A. SPOTTING EFFECT Specific Objective: Test for the presence of lipids by means of locating translucent spots/area in the filter paper. B. SOLUBILITY Specific Objective: To test for the solubility of the suspected lipid-containing samples. C. TEST FOR UNSATURATION (BROMINE WATER TEST) Specific Objective: To test for unsaturation of lipids through a change in colour or discoloration of the bromine water. To test
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RECRYSTALLIZATION AND MELTING POINT DETERMINATION OF BENZOIC ACID ANSWERS TO QUESTIONS 1. How does the use of fluted filter paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? Fluted filter paper is effective in preventing crystal formation in the filter paper. It is also often used in filtering hot saturated solution used during crystallization. One major advantage of a fluted filter is that it increases
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February 15‚ 2013 CHEM42 (Biochemistry) Laboratory ABSTRACT This experiment was performed to enlighten the researcher about the different properties and characteristics of lipids including its solubility and its complexity with regards to its components. The test for solubility tagged along the aphorism “like dissolves like” since coconut oil was dissolved in chloroform‚ ether‚ and carbon tetrachloride. The emulsification of fats in coconut oil was also conducted and the only the dilute
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The solubility of calcium hydroxide Aim: to find out the solubility of a substance that only partially dissolves in water. Method: place about 100cm3 of distilled water in a flask and add about one spatula of solid calcium hydroxide. Stopper the flask and shake well for one minute. Leave to stand for at least 24 hours. Titrate 10cm3 samples against 0.05 mol dm-3 hydrochloric acid solution using methyl orange as an indicator. Obtain enough results to calculate an accurate average‚ and then
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component (solute). The ability to dissolve is called solubility. Solvent: in an alloy‚ the element or compound present in greater amount Solute: in an alloy‚ the element or compound present in lesser amount Solid Solution: homogeneous maintains crystal structure contains randomly dispersed impurities (substitutional or interstitial) Second Phase: as solute atoms are added‚ new compounds / structures are formed‚ or solute forms local precipitates Solubility Limit of a component in a phase is the maximum
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co.nz/experiments/dissolvingsugar.html /24/2014 How temperatures affect the dissolving rate? http://ask.com/question/temperature-affect-dissolving-rate.html Solubility and factors that affect solubility http://sisd.net/factors.html Solubility http://en.wikipedia.org/wiki/solubility.html 4/29/2014 Factors that affect rate of dissolving solubility http://myclass.peelschhols.org
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Dilutions Calculations (M1V1 = M2V2‚ careful with M2) * Solution Stoichiometry * volume-volume conversions * volume-mass conversions * Molecular interpretation of solubility * solubility rules * Precipitation Reactions * Determining reaction products * Following Solubility rules * Molecular Formula‚ Total ionic formula‚ net ionic formula * Acid-Base Reactions * Oxidation-Reduction reactions
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Resolution of Matter into Pure Substances – Paper Chromatography Abstract The purpose of this laboratory was to determine how different substances have different solubilities in a given solvent. This was accomplished using the method of chromatography. The solubility of each substance was first determined by dropping a drop or two of each on a line drawn 2 inches above the bottom of a piece of paper. Then the paper was lightly bent in order to tape both sides of the paper leaving about a 4 centimeter
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PREPARATION OF TIN TETRAIODIDE 09/06/2012 Introduction The objective of this project was to prepare tin tetraiodide through the following reaction: Sn+2I2∆SnI4 and to measure the melting point of tin tetraiodide. Tin tetraiodide was recrystallized after the synthesis. The percent yield and the theoretical yield of tin tetraiodide were calculated. Recrystallization is to further improve the purity of tin tetraiodide. The solvent is carefully chosen to be toluene in order to maximize the recovery
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