3152-003 Experiment 2: Fractional Distillation and Gas Chromatography Introduction: The purpose of this experiment was to separate a mixture of ethyl acetate (EtOAc) and toluene by using the method of fractional distillation and to analyze the fractions using gas chromatography (GC). ethyl acetate toluene Distillation is a method known as separating or purifying a liquid or mixture by vaporization and condensation. In a simple distillation‚ the liquids being separated boil below 150 0C at 1 atmosphere
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com/experiments/chem-o/8/investigating_gas_chromatography/ Figure 8: Pre Fractional Distillation GC Results Sample | Boiling range (°C) | Volume (mL) | % Composition (lower bp : higher bp) | Fraction A | 52-54 | 14 | 60.66:33.15 | Fraction B | 35-84 | 6 | NA | Fraction C | 84-89 | 7 | 57.15:42.84 | Mixture | NA | 30 | 30.2/69.8 | Table 2: Tabulated Values
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distillation to separate the liquids. The same apparatus as day one was set up with a fresh sample of the liquid mixture. Three test tubes were labeled as fraction I‚II and III. The mixture was fractionally distilled and the collecting tubes was switched at the appropriate temperature. The volume‚ flammability‚ odour‚ density and boiling point of each fractions were recorded. After this experiment‚ we concluded that the liquids in the mixture were 2-propanol and water. Data/ Results: Heating Curve Data
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Speed and Accuracy to Add and Subtract Dissimilar Fractions. I. Introduction/Background of the Study Addition and subtraction of dissimilar fractions is one of the competencies that should be mastered by a pupil before he/she will graduate in the elementary. (PELC‚ BEC‚ 2002) However‚ this skill is one of the skills that is least mastered by pupils. It has been observed that Grade VI-pupils have difficulty in adding and subtracting fractions with unlike denominators. They tend to add both numerators
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how the predictions in table 3.1 were made. Each fraction for each ph was placed on its corresponding filter paper strips. The darkest color fraction is the one that is picked to be used on the TLC paper‚ giving the experimenter three fractions. For ph 3.5 the 6th fraction was used out of the 11 1ml samples taken. For ph 6.5 the 5th fraction was used out of the 25 samples‚ and for the 10.5 the 6th was used also out of 25 fractions. These fractions were then put onto TLC paper with the four known
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Skills Review - Vocabulary - Fractions/decimals/percentages - Rounding -Worded Problems Jane Stratton Objectives: • To review basic number skills that will be required throughout this unit • To review mathematical language used in this unit This unit assumes that you have some basic maths skills already If you have difficulty with any of the following topics please talk to your lecturer/tutor for advice The following slides will be available on MyLO you do not need to copy them down‚ but a list
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concepts of multiplication‚ Division and extending the set of numbers from integers to non integers and fractions. Misconception | Demonstration of why this is incorrect | Multiplication always makes a number larger or it stays the same stays the samesolution larger than original number (5) | Multiplication can make numbers smaller multiplication by a decimal less than 1 multiplication by a fraction less then 1multiplication by a negative | Division always makes numbers smaller or they stay the
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Liquid-vapor phase of acetone/chloroform was studied through distilling a series of mixtures with different mole fraction. When the mixtures were boiling‚ their vapor was condensed through a water column and collected in a receiving container. Refractive index was collected for starting mixture‚ distillate and residue for each sample. A boiling temperature versus acetone’s mole fraction was constructed to show the liquid-vapor phase diagram. The boiling temperature of azeotrope was determined to be
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Identification of the Marker Enzymes Present in Different Fractions of a Chicken Liver Cell Priscilla Mariel M. Cadiz Biology Department‚ De La Salle University‚ 2401 Taft Ave‚ Manila‚ Philippines *Email: cadizpriscillamariel@yahoo.com Cell Fractionation allows the organelles to be studied in more depth and detailed. It is an important technique in Cell Biology because it enables to obtain precise information about the different structure and functions of the organelles. Certain organelles
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1. (a) The diagram below represents the industrial fractional distillation of crude oil. (i) Identify fraction A. (ii) What property of the fractions allows them to be separated in the column? (2) (b) A gas oil fraction from the distillation of crude oil contains hydrocarbons in the C15 to C19 range. These hydrocarbons can be cracked by strong heating. (i) Write the molecular formula for the alkane with 19 carbon atoms. (ii) Name the type of reaction involved in cracking. (iii) Write
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