Organic chemistry 201 | Mixed Melting Points | Determination of an Unknown Solid | | [Type the author name] | 9/15/2011 | Purpose : The main purpose of this experiment was to identify an unknown compound/substance by performing multiple experimental melting point tests. Pure and impure solids were tested to see what affect pureness/impureness had on a melting point. Background: The melting point of a solid can be used to determine the purity of the solid. Pure samples usually have
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Lab 6: Organic Compound Analysis Isabella O’Toole CHY 116 Friday 1:15-4:00 Lab Conducted on 4-12-13 and 4-19-13 4-26-13 This lab was conducted in order to determine the chemical composition of an unknown organic acid. A known mass of acid was dissolved into 30mL of either water or methanol (depending on solubility) and titrated with standardized sodium hydroxide. Data from this allowed the molar
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Synthesis of Dulcin Objective: The main objective of this lab is to gain experience at a typical synthesis and semi-microscale recrystallization. Discussion Questions: 1) How fast should the temperature be raised when determining a melting point? When can the temperature be raised more quickly? 2) If there is an Impurity present in a sample‚ what is the effect on the melting point? 3) Explain why a) salt‚ spread on roads in the winter‚ helps prevent icing in‚ for instance‚ southern
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7/16/12 Heat of Fusion Heat of Fusion for Ice Introduction: This lab report is a step by step process in calculating the heat of fusion for ice and to compare the differences between salt added to room temperature water and salt added to icy water. To calculate heat of fusion‚ one must understand heat of fusion. Heat of fusion is the amount of heat required to convert a mass of a solid at its melting point into a liquid without an increase in temperature. As difficult as this may sound‚
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Old Dominion University ORGANIC 214 Alkene Addition Submitted by: Alkene addition: Bromination of (E) Stilbene Introduction: In this lab we used the greener approach‚ which involves the addition of bromine across a double bond. When bromine reacts with E-stilbene (trans-1‚2-diphenylethene)‚ two new chiral carbons are created from the sp2 carbons‚ therefore 3 different dibrominated stereoisomers are possible: meso-(1R‚2S)‚ or the raceminc mixture-(1R‚2R) or (1S‚2S)-dibromo-1‚2-diphenylethane
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drug. The identity of the drug was determined through melting point‚ percent recover‚ and Rf values. The comparable data for acetaminophen from the manufacturer is 500mg of active ingredient. After conducting the experiment-extraction‚ distillation‚ and evaporation- 451mg of active ingredient. This relates to a 68.1% recovery. The melting point was between 158 and 165 degrees Celsius‚ which is almost ten degrees lower than the published melting point of acetaminophen. After conducting a TLC plate‚ the
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recrystallized to form a solid‚ clear‚ crystal- like product. The melting was taken from the recrystallized product to determine what had been obtained. The melting point was found to be 130.5°C-133.7°C. Concluding that the product formed from the addition of bromine was a mixture of the erythro-2‚ 3-dibromo-3-phenylpropanoic acid‚ which has a known melting point of 204°C‚ and threo-2‚3-dibromo-3-phenylpropanoic acid‚ which has a known melting point of 95°C. Meaning the recrystallized product was a racemic
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Khoa Kirk Hoang OCHEM 262 Lab: Exp 35- Oxidation + Reduction Tablular Data Pre-Weighted Flask | Product + Flask | Product | % Yield | 5.36g | 5.401g | 0.041g | 41% | (60-70% = Acceptable) Actual Melting Point | Experimental Melting Point | 212C | 199.8 | ------------------------------------------------- (10C-15C variations acceptable) Reasons %yield: A reason that our percent yield is lower then what is acceptable can be due to various reasons. First‚ the amount of product we
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experiments 3.2 and 3.4 was to determine whether the melting/freezing or boiling point is a characteristic of the property of the substance. A characteristic property is a certain property (physical or chemical) that can determine or identify the substance. For example‚ density and magnetism are two characteristic properties that can distinguish objects from one another. In this case‚ we are figuring out whether the melting/freezing or boiling point of a substance will help us find out what the substance
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EXPERIMENT A: CIS-TRANS CONVERSION OF BUTENEDIOIC ACID PRE-LAB ASSIGNMENT 1. Maleic acid is the cis version and fumaric acis is the trans version of butenedioic acid. 2. 3. See attached paper. 4. Maleic anhydride is the compound that crystalizes in part A in the experiment. 5. HCl acts as a catalyst to break one of the carbonyl group in the maleic acid which rotates the structure to form a trans structure of the butonal acid which is the fumaric acid. And it does so by donating
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