boiling points of two different substances are very different. Fractional distillation is the separation of a mixture of multiple components into its various fractions according to the difference in their boiling temperatures. a.) Hexyl acetate and butyl acetate- Simple distillation should be used for these two compounds because their boiling points are very different. b.) Hexanol and cyclopentanol- Fractional distillation should be used because there is a small difference of boiling points between
Free Distillation
mL iodine flask. To the oil in the iodine flask‚ add 10 mL of dichloromethane acting as a solvent and mix by swirling gently. Add 20 mL of iodine monochloride solution from a burette and mix. Then add about 5 mL of a 2.5% solution of mercuric acetate in glacial acetic acid‚ which will act to catalyse the reaction. Insert the stopper which has been previously moistened with a solution of potassium iodide. Keep in a dark place for 3 minutes to allow the unsaturated fatty acid residues of the
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bottom and sides of the flask so a spatula will probably be needed to scrape them out. Washing the flask and crystals with ice- cold xylenes completes this process. The resulting dried product was recrystalized using hot ethyl acetate. A hot plate was used to boil ethyl acetate to be poured into a heating beaker with a mixture of EtoAc and adduct until the product dissolved. A sequential suction filtration completed this
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Anosmia is characterised as the loss of the ability to perceive smell‚ also known as a lack of olfactory function (Parker &Parker‚ 2004). Anosmia is said to be caused by an underdevelopment or absence of the olfactory bulbs and tracts (Dallago‚ Abech‚ Pereira-Lima‚ Leaes‚ Batista‚ Trarbach & Oliveira‚ 2008). It has been shown that approximately 1 in 10 000 males and 1 in 15 000 females are affected by this condition (Vowles‚ Bleach & Rowe-Jones‚ 1997). There are various disturbances that can cause
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precipitate accumulated at the top and also the bottom of the solution. The solution was thin. NaOH No precipitate seen‚ the solution was cream in color. Copper sulphate Light blue coagulated precipitate seen at the top of the solution. Lead Acetate Cloudy solution with small specks of white precipitate. Ice cold ethanol Cloudy at the bottom and about 0.5 cm of the top of the solution was clear. Table 4: The results of Gel Filtration Chromatography Eluate Component Volume collected
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Experiment 2: Starch Hydrolysis by Amylase Theoretical Background Polymers of carbohydrates are called polysaccharides‚ and make up some of the most important naturally occurring compounds [1]. They have thousands of monosaccharide units linked to each other by oxygen bridges. They include starch‚ glycogen‚ and cellulose‚ all three of which yield only glucose when completely hydrolyzed [2]. A B Figure 1. Starch (amylose) (A) and cellulose (B) Starch
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Title: Determination of Iron in Natural water by Spectrophotometry. Aim: To determine the iron in natural water by spectrophotometry. Abstract: The iron in natural water was determined by utilizing spectrophotometric analysis. That was done by measuring the absorbance of five Fe(oPH)2+3 standards at 510 nm. From that information‚ a calibration curve was plotted and used to find the amount of Fe2+ that was in two unknown water samples based on the absorbance readings obtained with them at 510nm. The
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Abstract Background Closantel is a halogenated salicylanilides with a potent anti parasiticanti-parasitic activity‚ . although Although Closantel it is widely used in the management of parasitic infestation in animals‚ but it is contraindicated in humans. Case Report A 34-year-old depressed mood man with a depressed mood was referred with bilateral progressive loss of vision in both eyes 10 days following after the inadvertent ingestion of three 500 mg tablets of Closantel. On fundus examination
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reduced pressure. b) Hot extraction : In this extraction also 100gm powdered root was subjected to hot extraction. In this extraction the solvents are used polarity wise such as‚ Sl no: Solvents Polarity 1 Pet. Ether 0.1 2 Chloroform 4.81 3 Ethyl acetate 6.02 4 Ethanol 24.55 For 100gram of plant material yield (g) of the Leaves extract is as
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Determination of Florfenicol in Catfish by UV-mediated High Performance Liquid Chromatography (HPLC) 1. Introduction 1.1 Description of the Analyte Florfenicol (C12H14Cl2FNO4S) is a derivative of thiamphenicol. Its structure is identical to that of chloramphenicol – a synthetically developed antibiotic for veterinary use‚ such as treating a wide range of bacterial infections (Hayes p. 7). It is commercially available as 50 percent of Aquaflor® premix‚ which has been approved for the control of bacteria
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