Solvent Essays

  • Recrystallization Of Acetanilide Essay

    920 Words  | 4 Pages

    contaminated with relatively small amounts of impurities using recrystallization. The success of recrystallization was dependent on a suitable solvent being chosen and proper recrystallization technique being carried out. The solvent chosen had to have a different polarity than that of the molecule of interest. The technique used was dependent on the solubility of the solvent at higher temperature and the solubility of the impurities at all temperatures. To analyze the acetanilide product of the reaction, 1H

  • Essential Oil Lab Report

    1394 Words  | 6 Pages

    methods such as steam and solvent extraction. Essential oils have been produced and used for different purposes for many centuries. There are signs that crude preparations

  • Essay On Thin Layer Chromatography

    1608 Words  | 7 Pages

    suitable size to accommodate the glass plates and capillary, ultraviolet light source emitting short 254 nm and long 366 nm wavelengths. Preparation of samples The extract of Bhrungaraj samples were prepared by taking 1.0 g of drug and 1-10 ml of solvent, extract was stirred for about 30 minutes and filtered. Preparation of Thin layers in plates The plates were cleaned, rinsed thoroughly until the water

  • Essay On Fractional Distillation

    740 Words  | 3 Pages

    contains impurities that have a bad flavour or odor. Fractional distillation is used to remove or reduce impurities. Solvent recycling and solvent purification is another area where fractional distillation technology is applied. Industry and laboratories use large amount of solvents. Used solvents contain contaminants that can be removed by fractional distillation. The recycled solvents have purities suitable for re-use. Fractional distillation is used to separate the crude oil into its various components

  • Cocaine Synthesis

    407 Words  | 2 Pages

    In literature, methanol has been used as a non-destructive solvent for the cocaine extraction from euro banknotes. . Different percentages of methanol were used to extract cocaine 50%, 70%, 80%, 90% and 100%. In addition, PBS was also used to extract cocaine and each note was preceded by a second extraction with methanol for the matrix effect. Subsequently, the extraction by methanol, the euro bank note was washed by 20 ml Milli-Q water/ 5ml methanol. The extracted solution was diluted by different

  • Dissolution Research Paper

    940 Words  | 4 Pages

    solution is the substance that is dissolved, while the solvent in the solution is the substance that dissolves the solute during dissolution. The question introduced in this lab is “What factors influence the rate at which one substances dissolves in another?” The three factors that affect the rate of dissolution are temperature, how much you stir the mixture, and the particle size of the substances. Temperature increases the chance of solute and solvent particles colliding with one another. Stirring the

  • Hexane Lab Report

    1619 Words  | 7 Pages

    Solvent used in the elution process would be the mobile phase and solvents of different polarity would have a significant impact on the separation due to the varying solubility of compounds in different solvents. Hexane, being the less polar solvent, interacts mainly with the less polar analytes but very slowly with polar analytes. Therefore using hexane at the start of the elution process allows the less polar compound to be eluted out first. After the complete collection of less polar analyte

  • Extract Trimyristin From Nutmeg

    920 Words  | 4 Pages

    from nutmeg, we had to determine the best way to find a solvent that would properly recrystalize it. We used triphenylmethane as a test compound, attempting to find a solvent that would allow it to recrystalize. The most suitable solvent would dissolve the solute when the solvent is hot, not dissolve it when the solvent is cold, and should be fairly volatile and easily removable from the desired product. We tested water as a potential solvent and triphenylmethane would not dissolve when the water

  • Organic Acid Lab Report

    933 Words  | 4 Pages

    Add 20 ml of solvent to the solution in the separatory funnel. b) Place the plastic stopper (NOT greased) in the neck of the funnel. Shake c) Drain the lower aqueous layer through the stopcock into the same 250 ml beaker in which the solution had been prepared in steps above. d) Pour the upper solvent layer through the neck of the funnel into a clean 125 ml Erlenmeyer flask. Return the aqueous solution from the 250 ml beaker to the separatory funnel. Add another fresh 20 ml of solvent to the funnel

  • Amino Acid Chromatography Essay

    991 Words  | 4 Pages

    to a strip of filter / chromatography paper short distances from one end(Figure 2) . The drop is allowed to dry , and the end of the paper nearest to the spots are placed in the developing solution , usually a water-containing organic solvent , so that the solvent flows past “spot” by capillary action and on down the length of the paper( Figure 1, 3) (Block, Durrum and

  • Nucleophilic Substitution Reactions Lab

    1039 Words  | 5 Pages

    as other products/reactants present in the filtered solution. The procedure was conducted by placing a TLC plate in a developing chamber that is filled with a small amount of solvent. The solvent cannot be too polar because it will cause spotted compounds on the TLC plate to rise up too fast, while a very non-polar solvent will not allow the spots to move. The polarity of the spots also determines how far it moves on the plate; non-polar spots are higher than polar ones. After spots on the TLC form

  • Chemical Reaction Lab Report

    1444 Words  | 6 Pages

    is carried out because the solutions of the starting materials and the products are colorless.  The organic acid is soluble in water and thus, does not separate.  It is necessary to extract the propionic acid from the aqueous solution with solvent.  The solvent solution must be dried to remove residual water, following which

  • Separatory Funnel Lab Report

    459 Words  | 2 Pages

    product of an organic reaction. A separatory funnel would be used for the isolation from the mixture. A solvent will be used to remove or isolate a compound of interest from a liquid substance. In most cases, water was used as the solvent to the reaction mixture to dissolve the inorganic compound. The organic compounds will be separated from the aqueous mixture by extraction with an organic solvent that is immiscible with water. Therefore, they will form two layers when they are mixed together. The

  • Lab Report P Toluic Acid And P-Butylphenol Extraction

    1864 Words  | 8 Pages

    (p-tert-butylphenol) and a neutral compound (acetanilide) using solvent extraction. Introduction Solvent extraction is a process that separates compounds from a mixture by a solvent. It involves the transfer of compounds from one liquid solvent to another liquid solvent. The two solvents used in this process should be immiscible to each other for the separation of compounds leading to an organic phase and an aqueous phase. The organic phase is composed of a solvent that is insoluble in water mainly consisting of

  • The Anthraquinone Dye Experiment

    867 Words  | 4 Pages

    the compounds in the mixture, column chromatography and thin layer chromatography uses portioning of a sample between a stationary solid phase and a liquid mobile phase. As the stationary phase, they use either silica gel or alumina, and organic solvents as the mobile phase. In order to accomplish the experiment, an unknown which is a solution of at least two anthraquinone dyes will be used. Then, a column chromatography is used to separate the components of the mixture into individual fractions

  • 5 Aminotetrazole Monohydrate Lab Report

    912 Words  | 4 Pages

    mmol) in distilled water (1.5 mL) was added dropwise in the dark to the solution of compound 2 (0.10 g, 0.60 mmol) in Deionized water (1.5 mL) under stirring. After 2-3 hour, the precipitate was filtered, and rinsed with 4 mL distilled water. The solvent was removed by rotary Evaporation to produce a white solid at 88% yield (0.10 g); N-(1-Carboxymethyl-1H-tetrazol-5-yl)-hydrazinium nitrate: Yield: 88%; yellow crystals;. IR (KBr): 3396, 3329, 3140, 3008, 1628, 1494, 1383 cm-1; UV (H2O): λmax = 293-296

  • High Performance Liquid Chromatography Lab Report

    1402 Words  | 6 Pages

    liquid chromatography, 2012). It is an improved form of column chromatography, where the solvent is passed through under high pressure instead of letting it drip down due to gravity. The sample is injected into the column to separate the sample of interest. The two different phases in HPLC are mobile and stationary phase. Separation of compounds is based on the stationary and mobile phase. Mobile phase is the solvent and the stationary

  • Methanol Lab Report

    1257 Words  | 6 Pages

    compounds. In extraction, two immiscible solvents with opposite polarities are used to dissolve different parts of the solute with different polarities, so they form two distinct liquid layers. In this experiment, methanol, an organic solvent, and an aqueous solution were used as the two immiscible solvents. The extraction solvent must also be capable of dissolving one of the mixture components. While initially it seems as though methanol, an organic solvent would be incapable of dissolving a polar

  • Separate Neutral Compounds

    711 Words  | 3 Pages

    used as a separation technique to separate the acid, base, and neutral compounds. In extraction, two immiscible solvents with different polarities are used to dissolve and separate different solute components, so they form two distinct liquid layers. In this experiment, ethyl acetate, an organic solvent, and an aqueous solution, were used as the two immiscible solvents. The extraction solvent must be capable of dissolving one of the mixture components, without irreversibly reacting with it. While initially

  • Photosynthetic Pigments Lab Report

    1294 Words  | 6 Pages

    of chromatography, and the one which this lab focuses on is paper chromatography. The components of the mixture, in this case, spinach leaves mixed with acetone, are pipetted at one end of the chromatography paper and hung in a jar slightly above solvent vapor to create the reaction. Hypothesis For this lab, we expect the polar pigments will have the largest Rf value whereas the non-polar pigments will