"Theory Melting Point Of Recrystallized Benzoic Acid" Essays and Research Papers

Theory Melting Point Of Recrystallized Benzoic Acid

Experiment 2&3 Recrystallization and Melting Points Determinantion of Benzoic Acid Abstract In experiment 2, recrystallization was used to purify the crude benzoic acid extracted from a mixture during experiment 1. Then a percent recovery for this recrystallization process was calculated. In experiment 3, the melting point ranges of the crude and purified benzoic acid were both determined by using Melt Temp Apparatus. Introduction Recrystallization is a purification technique for non-volatile...

Chemical substance, Chemistry, Liquid 2404  Words | 7  Pages

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Recrystallization of Benzoic Acid

multi-step purification of benzoic acid after performing the extraction from a mixture containing benzoic acid, cellulose, and methyl orange. Recrystallization was done to remove impurities from the sample. The amount of BA recovered during recrystallization is much less than the extracted amount of BA. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure samples will have a lower and wider melting point range. The experiment performed...

Chemistry, Crystal, Erlenmeyer flask 1920  Words | 6  Pages

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Benzoic Acid

EXPERIMENT 2: Recrystallization and Melting Point Recrystallization (or Crystallization) is a technique used to purify solids. This procedure relies on the fact that solubility increases as temperature increases (you can dissolve more sugar in hot water than in cold water). As a hot, saturated solution cools, it becomes supersaturated and the solute precipitates (crystallizes) out. In a recrystallization procedure, an impure (crude) solid is dissolved in a hot solvent. As this solution is cooled...

Crystal, Crystallization, Laboratory equipment 1714  Words | 6  Pages

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recrystallization of Benzoic acid

Mabel M. Kimble September 21, 2014 Chemistry 234 Recrystallization of Benzoic Acid ABSTRACT The recrystallization of Benzoic Acid was performed to fully master the ability to purify a solid compound. This form of purification technique is especially important in chemical identification, where the melting point of the compound is taken to confirm its purity. In order to perform recrystallization a solubility test much be completed. Four solvents (95% Ethanol, Petroleum Ether, Acetone and distilled...

Distillation, Ethanol, Oxygen 879  Words | 6  Pages

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Recrystallization of Benzoic Acid

Recrystallization of Benzoic Acid Objective To purify benzoic acid by recrystallization and gain experience with a basic organic laboratory techniques. Background Products of chemical reactions are often contaminated with impurities. One method for purifying chemicals, recrystallization, takes advantage of the differences in the solubilities of the desired products and the impurities and the tendency for the slow formation of crystals to exclude impurities from the crystalline solid. HC HC...

Chemical reaction, Chemistry, Crystal 743  Words | 3  Pages

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seperating techniques for benzoic acid

Unit 4B Task 2 Title Recrystallization of benzoic Acid Aim Equipment 1. Erlenmeyer flask 2. Graduated cylinder 3. Hot plate 4. Small beaker 5. Ice bath (if necessary) 6. Filter paper 7. Buchner funnel 8. Spatula 9. Weighing machine Method 1. Weighing paper was used to weigh approximately 1.00g of ‘impure Benzoic acid to produce re crystallization’. 2. Moved it to a 125ml Erlenmeyer flask. 3. Poured approximately 20ml of distilled water by using a graduated cylinder...

Chemical substance, Chemistry, Crystal 764  Words | 3  Pages

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Melting Point

Objective: To identify an organic compound and check it’s purity using the capillary method (Melting Point) Procedure: Purse Substances (Benzoic Acid Crystals/Urea) 1. Pure silicone oil in a clean and dry Thiele tube to a level just above the upper side arm of the tube. Pure 3mm of the pure substance (Benzoic Acid/Urea) into a clean watch glass, and using a metal spatula crush the substance into a small pile of powder. Insert the crushed powder into the open end of the capillary. Drop the...

Celsius, Chemical substance, Fahrenheit 998  Words | 3  Pages

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Recrystallization and Melting-Point Measurement Identifying a Constituent of “Panacetin”

Summary Purpose To purify the component (unknown) of Pancetin from last experiment and then compare its melt point to the two other possible substances. Theory Panacetin should be made up of about 50 percent of the unknown component that we previously separated out of Panacetin for testing. We suspect that this unknown compound is either acetanilide or phenacetin. From the solubility of acetaminophen and phenacetin, we could know both of them are relatively soluble in boiling water but insoluble...

Chemical compound, Chemical substance, Melting 607  Words | 3  Pages

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Recrystallization of Benzoic Acid

Recrystallization of Benzoic acid Chemistry 204-002 Date: 4/9/2011 Hector Ortega Recrystallization is a method used to purify compounds, and this is a very important procedure because compounds are naturally impure. Polarity and solubility play a big role in this experiment and these characteristics are exploited in order to have a crystallization of the desired compound. In this experimented benzoic acid was crystallize using ethanol and water. I chose these solvents based on part C of the experiment...

Benzene, Chemical polarity, Chemical substance 584  Words | 3  Pages

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Melting Point

Melting Point Determination Identity and Purity of Solid Organic Compounds Objectives • To introduce the technique of melting point determination. • To use the concept of melting points for identification and characterization of organic compounds. • Properly fill and use a capillary melting point tube. • Determine accurate melting point ranges for a wide variety of organic substances. Introduction The melting point of a solid can easily and accurately be determined...

Chemical substance, Liquid, Melting 1537  Words | 7  Pages

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Benzocaine: Cocaine and New Melting Point

esterification of p-aminobenzoic acid with ethanol. The percent yield of crude product was determined to be 21% and the melting point was recorded at 86.2°C ± 0.2°C, with a 6.3% error from 92°C, the literature melting point of pure benzocaine. The crude product was then recrystallized to improve the purity of benzocaine and 57.4% was recovered. The new melting point range was measured at 89.1°C ± 0.3°C, which has a 3.15% error. The infrared spectrum of the recrystallized product was measured to further...

Acid, Amine, Chemistry 1611  Words | 6  Pages

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Measuring the Melting Points of Compounds and Mixtures

Measuring the Melting Points of Compounds and Mixtures Introduction This exercise dealt with the melting points of pure mandelic acid and benzoic acid. The eutectic temperature and composition of mandelic and benzoic acid mixtures were determined. And finally, an unknown was identified by its mixtures and melting point. The melting point of a compound is used by organic chemists not only to identify the compound, but also to establish its purity. To determine the melting point two temperatures...

Benzoic acid, Capillary action, Chemical compound 1111  Words | 4  Pages

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Solids: Recrystallization and Melting Points

Solids: Recrystallization and Melting Points Reference: Chapter 3. Solids: Recrystallization and Melting Points. Read pages 93-94 and 113-117. Experimental procedure, pages 118-119. Parts 1-3. Part 1: Melting points of Urea and Cinnamic Acid. Part 2: Melting point of unknown. Part 3: Melting point of Mixture- Urea and Cinnamic Acid (take melting points of mixtures in 1:4, 1:1 and 4:1 ratios). Reactions Main Reaction: Not a chemical reaction but a physical reaction. Urea in solid mixed with...

Chemical substance, Liquid, Melting 1441  Words | 5  Pages

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Crystalization and Melting Points

Crystallization and Melting Points Organic Chemistry 221 9/19/2012 Intro/Purpose: The purpose of this lab was to use crystallization to separate a compound from a solvent and be able to choose the best solvent to do so. Then identify an unknown and verify purity using melting points. Solubility contributes to crystallization; because a solute has lower solubility at lower temperatures, which makes the solvent separate from the solution as a solid. This process is important to understand because...

Chemical polarity, Ethanol, Liquid 1182  Words | 4  Pages

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Melting Point Lab

Melting Point Determination and Thermometer Calibration Lab Background: The melting point of a substance, a solid in this case, signifies the temperature at which the first crystal starts to melt until the temperature at which the last crystal disappears is reached. That being said, melting points are expressed in ranges, am organic compound will have a sharp range depending on the purity of the compound. Impurity of an organic substance will register an abnormal melting point based on its...

Carboxylic acid, Chemical compound, Chemical substance 653  Words | 3  Pages

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Extraction of Benzoic Acid

Introduction: The theory behind the extraction of a solution containing benzoic acid, cellulose, and methyl orange involves many components pertaining to the fundamental ideas of solubility and polarity. Using the concepts of like dissolving like and acid base reactions, a solution of organic acid (benzoic acid), a water soluble compound cellulose, and an organic soluble compound methyl orange, can be separated and benzoic acid can be isolated by a method of extraction. At the fundamental...

Acid, Chemistry, Liquid-liquid extraction 915  Words | 3  Pages

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Separation of Benzoic Acid and Acetanilide

Obu Unknown #: 146 Fall-11 Organic Chemistry Midterm Report 13 October 2011 Table of Contents Separation of Benzoic Acid and Acetanilide 3 Extraction and Purification of Caffeine from Tea 4 Extraction of Trimyristin from Nutmeg 5 Conversion of t-butanol to t-butyl chloride 6 Appendix 7 Calculations 8 Literature and Experimental Values of Benzoic Acid and Acetanilide 9 Experimental Caffeine IR 10 Literature Caffeine IR 11 Experimental Trimyristin IR ...

Caffeine, Carboxylic acid, Distillation 1233  Words | 5  Pages

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Melting Point Determination

the impure particles in the compound are excluded from the crystal lattice. After obtaining the pure compound, a melting point determination procedure can be done using a mel-temp device to correctly identify the compound if its identity is unknown. In this experiment, the identity of a given unknown organic solid will be discovered using the methods of recrystallization and melting point determination. Safety Information • Be sure to add a boiling chip to any liquid before heating it. • Always...

Carbon, Crystal, Melting 742  Words | 3  Pages

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Lab 1 Melting Point

chemical by comparing its melting point with a known solid in table 1. Melting point is one of the characteristics of a chemical compound because it is dependent on the electro negativity and size of the compound. The compounds compared in the labs will be compared to chemical F. The known substances are: Benzil, p-t Butylphenol, Oxalic Acid, Thioacetamide, Acetanilide, Mandelic Acid, Benzoic Acid, Stilibene, Cholesterol, p-Hydroxypropiophenone, Adipic Acid, Citric Acid. In the experiment capillary...

Celsius, Chemical compound, Chemical substance 966  Words | 3  Pages

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Melting Point

Mixture Melting Points Abstraction Determining the melting point is very significant in order to identify an unknown. In this experiment, measuring the melting point was done by using melting point apparatus. The melting point of the unknown sample #10 was 111.5˚C. There were two possible compounds which were dibenzoyl ethylene and o-Toluic acid because their melting points were 111.2˚C and 109.8˚C when each compound was mixed with the unknown. Therefore, the unknown #10 was dibenzoyl ethylene...

Chemical compound, Chemical substance, Chemistry 930  Words | 3  Pages

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Determination of Melting Points

DETERMINATION OF MELTING POINTS LAB PP 1 From Gannon University SIM and Auburn University SIM INTRODUCTION The melting point of a pure compound is an intensive property, like density and boiling point. Intensive properties are independent of the amount of substance present. The melting point of a compound is the temperature at which it changes from a solid to a liquid. Experimentally, melting point is actually recorded as the range of temperatures in which the first crystal starts to melt until...

Capillary action, Inorganic compound, Intensive and extensive properties 759  Words | 5  Pages

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The Extraction of Benzoic Acid

polar compound in the aqueous and the less polar or nonpolar compound in the organic) and the compounds can be separated by separating the solvents from each other. In the chemically active extraction, organic acids and bases are separated from a mixture of compounds by converting the acid/base compound to a salt. The salt has a charge so it is soluble in aqueous solvents. The dissolved compound is then separated from the insoluble compounds using vacuum filtration. This technique can be used to...

Acetic acid, Benzene, Chemistry 2064  Words | 6  Pages

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Mixed Melting Points

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...

Capillary action, Chemical compound, Chemical substance 843  Words | 3  Pages

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Melting Point

Introduction The melting point is defined as the temperature at which the solid is in equilibrium with its liquid, and this characteristic is very unique, so a substance can be determined by the melting point. Determination of the melting point is very important technique in many areas of chemistry especially, in organic chemistry area because the melting point is really significant in order to identify the purity and the identity of a substance. Measuring the melting point is a fast and cost-effective...

Chemical substance, Chemistry, Liquid 755  Words | 3  Pages

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Melting Point Determination

| | | |Chem201L | | Determination of an Unknown Compound using Mixed Melting Point Method Winnie Adrian Ibanez, Jerome Allan Japitana, and Dante Jimenez III Group no. 7, 2Chem a Department of Chemistry, College of Science, University of Santo Tomas, España, Manila, 1015, Philippines |ARTICLE INFO ...

Chemical compound, Chemical substance, Chemistry 1858  Words | 7  Pages

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Acid-Base Extraction with Separatory Funnel

A. Title – Acid-Base Extraction with Separatory Funnel B. Introduction – The main objective of the experiment was the extract an acid, a base, and a neutral compound from a 2:1:1 compound of benzoic acid, p-nitroaniline, and azobenzene. In theory, an extraction technique based on phase distribution should allow two immiscible solvents to separate with a portion of the solute distributed into each. Using a separatory funnel, acids were extracted with bases (NaOH), and bases were extracted...

Acid, Chlorine, Ethanol 732  Words | 4  Pages

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Acid-Base Extraction. Essay

Objectives 1. To separate a mixture of an acid and a neutral compound into its component by extraction. 2. To determine the melting point and the yield of the benzoic acid and the unknown sample. 3. To determine the unknown sample whether is is Trimethylmethanol or 1,2,4,5-Tetrachlorobenzene. Introduction Extraction is a process of transferring a solute from one solvent to another. It is usually used to separate one or more components from a mixture. Diethyl ether, dichloromethane...

Benzoic acid, Chemistry, Chlorine 1295  Words | 4  Pages

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Freezing point and melting point

 Title Freezing and Melting Point Objectives 1. To gain proficiency in constructing a graph and plotting data points. 2. To determine the freezing points of a compound from the graph of decreasing temperature versus time. 3. To determine the melting points of a known and unknown compound. Introduction Physical changes are the changes in the physical properties of a substance (Moore, Stanitski & Jurs, 2009). Freezing point is the fixed temperature at which a pure liquid converted into...

Chemistry, Gas, Intermolecular force 1331  Words | 7  Pages

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The Purity and Purification of Solids- Melting Points of Napthalene and Biphenyl

collection jar was weighed and recorded. In the first recrystallization, 1.0 gram of adipic acid without the use of decoloring charcoal was recrystallized. After securing the yielded sample in one of the weighed jars, the next recrystallization was performed. As previously done, 1.0 gram of adipic acid was recrystallized. However, .10 gram of the pelltized decoloring charcoal was added to the sample. The yielded adipic acid was also collected in one of the weighed jars Both samples were left without caps...

Chemical substance, Chemistry, Crystal 709  Words | 5  Pages

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acid base extraction: naphthalene, 4-chloroaniline and benzoic acid

 Acid-Base Extraction: Separation of an Organic Acid, Base and a Neural Compound Introduction/Background Acid base extraction is a widely used commercial method in separating acids, bases and neutral compounds. This is concept is based on several physical properties of the compounds, such as boiling point, melting points and solubility. The different solubility properties of the protonated and non-protonated forms of these compounds depend on the functional groups...

Acid, Acid dissociation constant, Acids 978  Words | 5  Pages

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Crystallization of Benzoic Acid

Crystallization of Benzoic Acid Purpose: The purpose of this experiment is to purify benzoic acid by crystallization. Procedure: 1. 0.5g impure benzoic acid was placed in a 50mL Erlenmeyer flask. 15mL of water was added and the mixture was heated to a boil on a hot plate. 0.5mL of water was added to the flask, while swirling the flask. The mixture was boiled until the benzoic acid completely dissolved. The total volume of water used was recorded. The black solid that remain in the dissolved...

Crystal, Fahrenheit, Filter paper 557  Words | 2  Pages

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Chem 31.1 Experiment 2 Recrystallization and Melting Point Determination of Benzoic Acid

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...

Crystal, Ethanol, Filter 485  Words | 2  Pages

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Melting Point

Finding the melting point of an organic substance is a practical and efficient way for scientists to identify an unknown substance or determine a known substance's level of purity. When organic substances are mixed together in varying degrees they take on a melting characteristic that is lower and broader than in its pure form. This property was manipulated in the lab to observe the various melting points of Naphthalene and Biphenyl when the percentage of composition was altered. A eutectic point of 45...

Carbon, Chemical substance, Crystal 1566  Words | 6  Pages

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Melting Points

Lab/ Chem 234 02/17/13 Lab 2: Melting Points Purpose: To determine the purity of a substance using melting point as physical property. We must also learn how to identify an unknown compound using its melting point. We got to identify an unknown compound using mixture melting point and finally we must learn to obtain an accurate melting point using Mel-Temp apparatus. Procedure: Set voltage to obtain the desired heating rate at the anticipated melting point range. The voltage control controls...

Celsius, Fahrenheit, Temperature 577  Words | 3  Pages

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Extraction Extraction with acid and alkali

 EXPERIMENT 13: Extraction: Extraction with acid and alkali Objective 1. To recover the benzoic acid and p-dichlorobenzene from its mixture from its mixture by using acid-alkali extraction. 2. To determine the percentage recovery and melting point of the recovered benzoic acid and p-dichlorobenzene. Introduction Acid-base extraction is a process which purifying the acids and bases from mixtures based on their chemical properties. Acid-base extraction is performed to isolate the compounds and natural...

Acetic acid, Acid, Benzene 1686  Words | 7  Pages

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Extraction with Acid and Alkaline

Title:Extraction:Extraction with acid and alkaline Objective: 1. To recover benzoic acid and p-dichlorobenzene from its mixture using acid-alkaline extraction. 2. To determine the percentage recovery and melting point of benzoic acid and p-diclorobenzene. Apparatus:Separatory funnel(250mL),Buchner funnel,beaker. Materials:Benzoic acid,p-dichlorobenzene,ether,10% NaOH,conc.HCl,distilled water, anhydrous CaCl2. Introduction: Organic compounds in an aqueous mixture can be...

Chlorine, Hydrochloric acid, Sodium 2043  Words | 7  Pages

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The Melting Point Analysis of Crude and Recrystallized Acetaminophen Synthesized from P-Aminophenol and Acetic Anhydride

to synthesize crude acetaminophen, resulting in 0.097 grams (47.48% yield). The crude acetaminophen was then recrystallized in a solvent of water and methanol over heat resulting in 0.082 grams (39.61% yield) of pure acetaminophen. Melting points of both crude and pure acetaminophen were taken, and found to be 165.9 - 170.9°C and 168.2 - 171.5°C, respectively. The literature melting point of acetaminophen is 169.5 – 171.0°C, indicating that our final product was pure. Introduction ...

Acetic acid, Acetic anhydride, Aspirin 1087  Words | 4  Pages

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Lab2 Recrystallization And Melting Point

Experiment 1: Recrystallization and Melting Point Measurement: Identifying a component of panacetin. I have submitted a copy of this report on Canvas. ______________________________________ Signature Date Introduction The goal of the following experiment was to identify whether an unknown component of panacetin was acetanilide or phenacetin through recrystallization, the dissolution of an impure substance in a boiling solvent, and the examination of melting points from the obtained crystals of...

Boiling, Crystal, Liquid 1517  Words | 4  Pages

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The Purity and Purification of Solids Melting Point Lab

The Purity and Purification of Solids Melting Point Lab Introduction: The point of this lab was to determine the eutectic point for the naphthalene biphenyl mixture, as well as determining the melting point of an unknown substance by comparing it with two known samples. Melting point is a temperature in which a substance changes from solid state to liquid state. Melting points are used to determine whether the given substance is pure or not. Substances that melt sharply, less than 1-2°C indicates...

Chemical compound, Chemical substance, Chemistry 1571  Words | 4  Pages

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Purity and Purifications of Solids Using Melting Points.

of solids using melting points. Tatyana Aleksandrova CHE 337, Section 001 Department of Chemistry Portland State University, Portland, OR                                                                     Abstract Melting points of Naphthalene/Biphenyl mixtures differing in their percent compositions were observed and plotted on a graph that indicated eutectic point of the mixture to be at 50 mole percent Naphthalene. Using melting point technique to identify...

Chemical compound, Chemical substance, Chemistry 1088  Words | 6  Pages

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Lab #1 - Melting Points

Determine the melting points of two organic compounds known to have the same melting range when pure. b) Determine the mixture melting point of a mixture of the two pure compounds. c) Identify an unknown organic compound by determining its melting point and mixture melting point. Procedure and Observations: Using the procedure outlined in Appendix A of the Lab Manual, approximately equal samples of p-Nitrophenol and acetanilide, which are known to have the same melting range of 113-114...

Chemical compound, Chemical substance, Melting 749  Words | 3  Pages

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Benzoic Acid and Benzoates in Food

Benzoic Acid and Benzoates in Food, Drinks and Medicines Benzoic acid and benzoates are common additives to food, drinks, medicines and cosmetics, and they also occur naturally in many plants. They are useful chemicals in manufactured products because they kill or inhibit both bacteria and fungi and can act as preservatives. Benzoic acid and benzoates are considered to be safe chemicals for humans when they're used in small quantities, but there are at least two situations in which even small...

Benzoic acid, Benzoin resin, Carboxylic acid 906  Words | 3  Pages

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Physics Experiment: Analyzing Freezing Point Depression

students investigated about freezing point depression and at what temperature the substance changes states. The students used the freezing point depression to find the molar mass of benzoic acid. First they heated lauric acid to determine the temperature that the freezing point of the solvent is and then compared the temperature to that of the lauric acid/ benzoic acid solution. They then took the change in temperature in order to determine the molality of the benzoic acid, which was calculated to be 1...

Absolute zero, Boiling point, Celsius 869  Words | 4  Pages

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Preparation of Aspirin and Determination of the Melting Point

PREPARATION OF ASPIRIN AND DETERMINATION OF THE MELTING POINT Ferrer, Lara Melissa V. Faculty of Engineering University of Santo Tomas Manila, Philippines ABSTRACT This experiment involved three steps: synthesis of aspirin, isolation and purification, and the estimation of purity of the final product. The synthesis involved the reaction of salicylic acid and acetic anhydride in the presence of a catalyst, phosphoric acid, H3PO4. When the aspirin was prepared, it was isolated and filtered...

Acetic acid, Acetic anhydride, Acetyl 1461  Words | 5  Pages

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Acetylsalicylic Acid

Experiment 8: Acetylsalicylic Acid Post lab: Restatement of experiment: Aspirin (acetylsalicylic acid) is a derivative of salicylic acid with the same medicinal values but fewer side effects. It is used widely as a pain killer and anti-inflammatory. In this experiment, aspirin was synthesized from salicylic acid and acetic anhydride. To determine the product’s purity, the melting point of aspirin was then measured using a Thomas-Hoover Uni- Melt device. The product had a low percent yield and...

Acetic acid, Acetic anhydride, Aspirin 824  Words | 3  Pages

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salicylic acid

Synthesis of Salicylic Acid Experimental Data: 1. Mass of methyl salicylate used: 0.232 g 2. Theoretical yield of salicylic acid: 0.211 g 3. Volume H2SO4 added, with units (drops or mL): 3mL 4. Mass of crude salicylic acid obtained: 0.250 g 5. Volume of water used as recrystallizing solvent: 2 mL 6. Mass of purified salicylic acid: 0.134 g 7. Percent yield of purified salicylic acid from reaction: 63.5% 8. Melting point of purified product: 158-160 oC 9. Name of NMR solvent used and...

Acetic acid, Carbon, Carboxylic acid 824  Words | 3  Pages

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Esterification of Methyl Benzoate from Benzoic Acid

Esterification of Methyl Benzoate from Benzoic Acid October 28, 2010 Abstract: This experiment was conducted to synthesize methyl benzoate from benzoic acid and methanol by using the Fischer esterification method. Methanol (12.5ml) and Benzoic acid (4.9 grams) are heated together in the presence of concentrated sulfuric acid (1.5ml) until equilibrium is achieved. A reflux apparatus is set up for 1 hour to carry out the reaction at the boiling point of the solvent (Methanol, 2.5ml). Then...

Ammonia, Benzene, Distillation 568  Words | 3  Pages

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The Purity and Purification of Solid's Melting Points

and Purification of Solids Melting Points CH-337 Abstract: The purpose of this experiment was to find the eutectic point for the mixture of naphthalene and biphenyl. This was done by measuring the melting point of both pure substances and five mixtures of different ratios. The purpose of the second section was to identify an unknown sample by measuring its melting point and mixing it with two known substances and comparing them. The results suggest that the eutectic point is closest to the weight...

Chemical compound, Chemical substance, Measurement 880  Words | 2  Pages

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Melting Point and Recrystallization

Recrystallization and Melting Point of Benzoic Acid Organic Chemistry 1 10/4/12 Abstract Recrystallization was done to remove impurities from the sample. The percent recovery of benzoic acid during recrystallization is 23.02%. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure sample had a lower and wider melting point range of 120.1-122.2 (C). The pure sample melting point range was 121.3-122.5 (C). These ranges helped...

Chemical substance, Chemistry, Crystal 2877  Words | 8  Pages

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Rise of Han

components. Lastly, melting point experiments and thin layer chromatography were used to compare the purity of each component. Procedure **** See class packet 3.010 grams of the mixture consisting of crude benzoic acid, p-nitroaniline and benzil was weighed out. P-nitroaniline was not recrystallized as was documented in the procedure. Results Data Mass Data p-nitroaniline Benzoic Acid Benzile Mass of Crude Component 0.210 g 0.882 g 0.995 g Mass of recrystallized components none...

Benzene, Carboxylic acid, Chemical compound 1205  Words | 5  Pages

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Melting Point and Boiling Point of Compounds

Engineering and Chemistry Muralla St., Intramuros, Manila Melting Point and Boiling Point of Organic Compounds Group No. 5 Manacup, Cris Vincent L. Oblena, Adrian D. Ong, Joshua Jyro B.* *Leader ABSTRACT In compounds, two of the physical properties affected by the varying structures are melting point and boiling point. Through the use of the Thomas-Hoover Melting Point Apparatus or the micro method, the melting and boiling point of organic compounds are now determined. The aim of this...

Carboxylic acid, Chemical bonding, Covalent bond 1973  Words | 9  Pages

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Extraction of Benzoic Acid

is to practice common organic laboratory techniques inside the lab to get one oriented to the basic methods of procedure that can be used for later experiments. This experiment involves the separation of benzoic acid from a more crude form, consisting of benzoic acid, methyl orange, a common acid/base indicator, and cellulose, a natural polymer of glucose (Huston, and Liu 17-24). The technique that is used to perform this separation is called extraction. Extraction is a systematic process of separating...

Acetic acid, Benzene, Diethyl ether 1211  Words | 3  Pages

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Separation of a Carboxylic Acid, a Phenol, and a Neutral Substance

Objective: The objective of this experiment is to use acid-base extraction techniques to separate a mixture of organic compounds based on acidity and/or basicity. After the three compounds are separated we will recover them into their salt forms and then purify them by recrystallization and identify them by their melting points. Procedure: Extraction of Carboxylic Acid A pre-weighed (0.315g) mixture of Carboxylic acid, a phenol, and neutral substance was placed into a reaction tube (tube 1)...

Acetic acid, Acid, Acid dissociation constant 931  Words | 3  Pages

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Carboxylic Acids and Their Derivatives. Laboratory Report

Carboxylic Acids and Their Derivatives Ma. Marielle M. Medura Prof. Emma Boncales Chem 23A (TTH 01:00-4:00 p.m) Carboxylic Acids and Their Derivatives I. Introduction Carboxylic acids is an organic compound that contains a carboxylic group(-COOH). Its general formula is R-C=OOH with R referring to the rest of the molecule such as H and C. They are directly attached to a carbonyl group and the interaction between them affects the reactions of each. The polarity of the O-H bond...

Acetic acid, Amide, Base 903  Words | 5  Pages

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Use of Extraction to Isolate a Neutral Compound from a Mixture Containing an Acid Impurity.

techniques that allowed the extraction of the acid, the isolation of the neutral compound and the melting point classification of the neutral compound to test the purity of the sample. Chemical Reactions: HA + OH-  A- + H2O R-COOH + OH-  R-COO- + H2O Organic Acid Insoluble in H2O Conjugate base Soluble in H2O Procedure: A 0.170g sample consisting of a mixture of 0.110g of an unknown neutral compound and 0.060g of benzoic acid was mixed with ether and shaken until all solids...

Acid, Chemical compound, Chemical substance 1235  Words | 4  Pages

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Synthesis of Adipic Acid

8: Synthesis of Adipic Acid Performed November 8th & 10th By Jennifer Seitz Organic Chemistry 344 Section 803 Fall 2011 Objective: The purpose of this experiment was to synthesize adipic acid from cyclohexanol via an oxidation reaction that was catalyzed by sulfuric acid. Purity of the product was assessed by measuring the melting point. Physical Properties/Structures: Name | Formula | Molecular Weight (g/mol) | Boiling Point (0C) | Melting Point(0C) | Density(g/mL) | Hazards...

Alcohol, Aldehyde, Carbon 1681  Words | 6  Pages

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Acetylsalicylic Acid Synthesis

October 9, 2013 Partner(s): Acetylsalicylic Acid Synthesis Theory. This experiment was carried out to see how the hydroxyl group on the benzene ring in salicylic acid reacts with acetic anhydride to form an ester, and to make aspirin. Synthesis of Acetylsalicylic Acid occurs by protonation of carbonyl (C=O) group, and a nucleophilic attack of OH on the acetic anhydride. The ferric chloride test and melting point were used to test the purity of the results. A hypothesized recovery rater of...

Acetic acid, Acetic anhydride, Aspirin 577  Words | 4  Pages

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CHEMISTRY 343 - Organic Chemistry Laboratory I – Summer 2013 Lab 32: Crystallization of Benzoic Acid You will learn and apply the technique of crystallization for the purification of a crude or impure organic substance. You will also learn more about the technique of melting point determination to characterize the identity of an organic solid, and to access its purity. You will also use IR spectroscopy to verify the functional groups in your crystallized product. Pre-lab Assignment: ...

Chemistry, Crystal, Infrared 1363  Words | 5  Pages

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Melting Point Lab Report

unknown sample was number 18. I did three melting point trials, which resulted in a melting point range of approximately 120°C to 122°C, as shown in Table 1. I also did two mixed melting point trials using Benzoic Acid and Succinimide, as shown in Table 2. Percent recovery is 28.26 grams. Table 1: Unknown Melting Point Trials Trial Melting Point 1 120°C – 122°C 2 120°C – 122°C 3 119°C - 122°C Table 2: Mixed Melting Point Trials Trial Benzoic Acid MP Unknown #18 MP Succinimide MP 1 122°C...

Benzene, Chemical substance, Chemistry 432  Words | 2  Pages

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Melting Points Lab Report

Melting Points Elizabeth McGrail Organic Chemistry I 25 January 2013 ABSTRACT The objectives of this lab are, as follows; to understand what occurs at the molecular level when a substance melts; to understand the primary purpose of melting point data; to demonstrate the technique for obtaining the melting point of an organic substance; and to explain the effect of impurities on the melting point of a substance. Through the experimentation of three substances, tetracosane, 1-tetradecanol and...

Chemical bond, Chemical compound, Chemical substance 1327  Words | 5  Pages

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