Retention times (mins): Anthracene 8.67 Benzene 4.37 Naphthalene 5.98 Anthracene standards Peak Area Ratio Sample Concentration Anthracene Benzene A/B 4 2.25 mg/100mL 355003 496920 0.714406746 3 4.5 mg/100mL 583453 467385 1.248334885 2 6.75 mg/100mL 888620 513249 1.73136236 1 9 mg/100mL 1097279 518713 2.115387507 Naphthalene standards Peak Area Ratio Sample Concentration Naphthalene Benzene N/B 4 1.5 mg/100mL 667589 496920 1.343453675
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Experiment #1: Determination of the Solid-Liquid Phase Diagram for Napthalene-Biphenyl Using Thermal Analysis Objective To apply thermal analysis to the two-component system‚ naphthalene-biphenyl at atmospheric temperature. The analysis will be represented by a solid-liquid phase diagram (freezing point diagram). Theoretical Principles Phase Equilibria and the Gibbs Phase Rule This experiment is conducted in order to study a condensed system (solid-liquid) at constant temperature (atmospheric
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TWO-BASE EXTRACTION OF BENZOIC ACID‚ 2-NAPHTHOL‚ AND NAPHTHALENE FROM UNKNOWN SAMPLE # 131 Douglas G. Balmer (T.A. Mike Hall) Dr. Dailey Submitted 11 July 2007 Introduction: The purpose of this experiment was to separate a sample of benzoic acid‚ 2- naphthol‚ and naphthalene of unknown proportions using a two-base extraction method. The three components of the mixture will react differently to sodium bicarbonate and sodium hydroxide because each of the bases’ conjugate acids has a different
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1. | An experiment is carried out to determine the freezing point of naphthalene.Solid naphthalene is heated in a water bath until it melts completely. The initial temperature is recorded. Then molten naphthalene is left to cool. The reading of the temperature is recorded every 30 seconds. Figure below shows the recorded thermometer readings at 30 seconds intervals. Satu eksperimen dijalankan untuk menentukan takat beku naftalena. Pepejal naftalena dipanaskan di dalam kukus air sehingga melebur
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for the later calculations. I. Introduction A. Background This experiment shows how one determines the temperature-composition diagram for a two-component system. The procedure will consist of obtaining cooling curves for the pure substances and a number of their mixtures. A cooling curve is constructed by melting a sample‚ then allowing it to cool‚ measuring the temperature at regular intervals. When only melt is present‚ there is a constant cooling rate. As the solid begins to form‚ the system
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4Chapter 2: the Structure of the Atom A) Matter 1. Matter 2 3 Element Compound 4. Atom 5. Molecule 6. Ion 7. Diffusion Is anything that occupies space and has mass. Is made up of tiny and discrete particles. There are spaces between these particles. These particles may be atoms‚ molecules or ions. Matter exists in three states solid‚ liquid and gas Is a substance that consists of only one type of atom Is a substance that contains two or more elements that are chemically bonded together Molecule
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microbial consortium growing on a mixture of hydrocarbons representing four structural classes of hydrocarbons. The microbial biodegradation rate of hexadecane‚ dodecane‚ benzene‚ toluene‚ iso-octane‚ pristane (2‚6‚10‚14 tetramethyl pentadecane)‚ naphthalene‚ and phenanthrene in the presence and absence of a mixture of rhamnolipid biosurfactant was determined. A first-order biodegradation model was applied in these studies to better discern the differential solubilization and biodegradation rates
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solute / kg solvent METHODS Part 1 : Determination of the Freezing Point of Naphthalene 1. A clean and dry test tube was weighted. 2. About 5 g naphthalene was added to the test tube and weighted again. 3. The naphthalene was melted by using a water bath. 4. The test tube with melted naphthalene was transferred from the water bath‚ dried and clamped it on a retort stand. 5. The liquid naphthalene was stirred continuously so that no temperature gradient develops and the temperature
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Introduction The purpose of the experiment was to determine the melting points of compounds using a Mel-Temp device. The melting point of naphthalene‚ urea‚ and sulfanilamide are found. This is then followed by the measuring of an unknown compound‚ and an impure sample (a small amount of naphthalene mixed with the unknown). Experiment In the lab‚ the height of the chemical in the capillary was set to 2-3 mm thickness. The voltage at the Mel-Temp started at a low setting of 1.5-2. The heat was
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EXPERIMENT #1: THE PURITY AND PURIFICATION OF SOLIDS MELTING POINTS ABSTRACT Melting points of different mixtures of naphthalene and biphenyl were examined in this lab. Samples of these various mixtures were collected and tested by different individuals in the lab in order to find the eutectic point of biphenyl. Unknown substances were then tested using the mixture melting point method in order to determine their identities. INTRODUCTION The melting point of a solid is the temperature
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