Chem 231: 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
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SCIN131 - Intro to Chemistry Final Exam Review - Multiple Choice Return to Assessment List Part 1 of 8 - 6.0/ 6.0 Points Question 1 of 23 2.0/ 2.0 Points How many core electrons are in a chlorine atom? A.10 B.7 C.17 D.1 E.none of the above Answer Key: A Question 2 of 23 2.0/ 2.0 Points Which subshell letter corresponds to a spherical orbital? A.f B.d C.p D.s E.not enough information Answer Key: D Question
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Column and Thin Layer Chromatography: The Separation of Spinach Pigment Abstract Spinach extract was separated into fractions containing compounds of similar polarity by column chromatography. Based on solid-liquid phase partitioning‚ this separation technique exploited the different polarity of the compounds in the spinach extract. Three fractions with different colors were obtained. The extract and its fractions were analyzed using thin layer chromatography (TLC). The TLC results showed that
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1. Your Herbarium collection should consist of: • At least 8 weed mounted specimens‚ each specimen with a complete label. A standard artists Sketch Book approximately 37 x 27 cm (or A3) has suitable pages on which to mount specimens. Mounting of specimens may be done with good quality tape (archival 3M)‚ water-soluble glue such as PVA wood glue or sewing using dental tape. • Your specimens should include: 8 specimens (min.) of declared weeds. • All material should be ideally in a reproductive
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chromatography paper and put into a beaker filled with solvent. The solvent will then flow through the paper. The solvent chosen depends highly on its polarity as this will be the characteristic that will separate the different substances. Petroleum‚ ether‚ hexanes‚ cyclohexanes and toluene are some examples of solvents with different polarities as well as increasing polarities.
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ABSTRACT Antibacterial activity of medicnal plants has turned out to be a global concern. Medicnal plants are very useful in treating various diseases. Antibiotics are an important class of pharmacological agents used for treating antibacterial infections. Although antibiotics were first isolated from fungi and bacteria but over the years more and more synthetic antibiotics has been synthesized‚ which are in great demand. This present study has been done to determine the antibacterial activity of
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vascularisation. In this study‚ the pericarp of the Calabash (Crescentia Cujete) is utilized as an effective treatment for stopping tumour vascularisation.The obtained 457g of Calabash Fruit pericarp was soaked by solvent extraction using 1.5L 95%-Hexane and 1.5L 95%-Ethanol for 24 hours each. The extract was filtered and evaporated using rotary evaporator for 3 hours and further dried for 24 hours. The residual crude extract was poured in a glass container. The extracts were tested through Chorioallontoic
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below 100 °C and can even be liquids at room temperature. Ionic liquids can be very useful as alternative solvents because of their negligible vapour pressure‚ low combustibility‚ and high thermal stability. Traditional solvents‚ such as ether and hexane‚ have high vapour pressures (evaporate readily). In addition‚ the fumes are an irritant (cause dizziness and headaches) and are highly flammable. Therefore‚ the use of
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CHAPTER ONE INTRODUCTION Croton is an extensive flowering plant genus in the spurge family‚ Euphorbiaceae‚ established by Carl Linnaeus in 1737. The plants of this genus were described and introduced to Europeans by George Eberhard Rumphius. The common names for this genus are rush foil and croton‚ but the latter also refers to Codiaeum variegatum. The generic name comes from the Greek κροτον (kroton)‚ which means "tick" and refers to the shape of the seeds of certain species (Gledhill‚ 2008).
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ISOLATION OF TRIMYRISTIN FROM NUTMEG ABSTRACT The purpose if the experiment was to extract the Trimyristan from ground nutmeg using extraction‚ distillation and recrystallization procedures. This experiment involves extraction and separation techniques that yield a purified product. The product was extracted and a distillation process was used to remove any remaining solvent. The recrystallization of the sample in turn produced a pure sample‚ which was proven using the known melting
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