Organic Chemistry Lab EXPERIMENT #2 and #3 Extraction and Evaporation Recrystallization and Melting Point Measurement PURPOSE: 1. To the components of a simulated pharmaceutical preparation‚ Panacetin‚ and identifying the unknown component of the mixture through extraction and separation methods. 2. To learn how to purify by recrystallization‚ how to dry them and how to obtain a melting point. PRECAUTION: ACETANILIDE AND PHENACETIN ARE EYE AND SKIN IRRITANTS. Minimize contact with
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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
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is done by observing the melting point. This is important because if there is an impure substance the melting point would be depression and the melting range would be broader. By finding the melting point of a known substance one can then observe an unknown substance’s melting point to see if the points are the same and try to figure out the unknown. Experimental Section: The first known substance we used was Biphenyl. 68 degrees Celsius is the known melting point. We used the capillary method
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The Purity and Purification of Solids- Part 2- Recrystallization Courtney Percival CH 337 Laboratory‚ Section 037 Department of Chemistry Portland State University‚ Portland OR ABSTRACT INTRODUCTION Recrystallization is a commonly used tool in laboratories when dealing with impure solids. "An effective recrystallization is one in which 1) a high degree of purity is achieved as well as 2) a maximum recovery of sample".1 Solubility‚ the tendency of a substance to dissolve in a liquid‚ is an
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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
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Towra Point Report By Julian Burst Introduction This report is based on the Towra Point Nature Reserve‚ in Kurnell. On our excursion‚ we got detailed information on various bits of information about organisms such as plants like mangroves‚ and animals such as the Soldier Crab and many species of birds and spiders. Things such as the types of Trophic Interactions show the levels of species and to clearly show what species is a stronger predator then the other. With the use of mathematical formulae
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Research report Water is very important .We need water to drink‚ to wash our hands‚ to cook‚ to water plants and many other things. Without water‚ the plants would die and people and animals would go thirsty. What is water? Water is made up of two hydrogen atoms‚ and one oxygen atom. When these atoms come together‚ they form a strong bond that can’t be broken. What is Table salt? Sodium chloride Designed for cooking Has many ingredients 1. Potassium iodine- stabilizer
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Science Project : Sublimation of Dry Ice in Water Christopher Drake Dana Smith Panut Panusiri Ehsan Subhani Period 4 Honors Chemistry Mr. Mattson Table of Contents Purpose 3 Experimental Questions 4 Preliminary Research
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Metaphor of the Melting Pot Peggy Ruth Geren The melting pot has been used metaphorically to describe the dynamics of American social life. In addition to its descriptive uses‚ it has also been used to describe what should or should not take place in American social life. How did the term originate? How was it used originally? How is it used in contemporary society? What are some problems with the idea of the melting pot? How is public education connected to the idea of the melting pot? How does
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Experiment In this experiment a high vacuum sublimation was performed to determine the vapor pressure and finally the enthalpy of sublimation of Vanillin and o-Vanillin. AKnudsen cell with sample was weighed 10 times maybe just say weighed by difference‚ they don’t usually like it when you spell out the steps like that no way it was like 0.5 grams‚ check the lab again and at least 0.5 g of Vanillin or o-Vanillin was added to the cell and it was reweighed 10 times. This experiment depended heavily
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