Post Lab #4- Column Chromatography Organic Chem 3418-2 March 3‚ 2011 Theoretical Background- The fluorene and fluorenone mixture was separated by first dissolving the mixture in heptane. Since “like dissolves like”‚ fluorene dissolves with the non-polar heptane and the polar fluorenone dissolves in the polar ethyl acetate solvent. This phenomenon was illustrated in class before the experiment‚ when it was pointed out why water will not dissolve fluorene‚ fluorenone‚ or transstilbene
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10 MIXING AND AGITATION gitation is a means whereby mixing of phases can be accomplished and by which mass and heat transfer can be enhanced between phases or with external surfaces. In its most general sense‚ the process of mixing is concerned with all combinations of phases of which the most frequently occurring ones are A 7. gases with gases. 2. gases into liquids: dispersion. 3. gases with granular solids: fluidization‚ pneumatic conveying‚ drying. 4. liquids into gases: spraying and atomization
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which is a fluid that doesn’t have consistent viscosity. This depends on temperature for viscosity like other fluids such as honey. As the temperature of the honey increases‚ its viscosity decreases. Also‚ for the custard cream‚ the viscosity increases as less force is applied to it‚ which means that it is force-dependent. If the egg or starch is missing‚ then the viscosity will decrease. In order for the custard cream to have a consistent viscosity‚ the temperature of cooking the cream should be
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Lab Day/Time____________ Cardiovascular Dynamics This experiment examines the factors that effect blood flow through a blood vessel. The rate of blood flow is influenced by the pressure gradient in the vessel‚ the radius of the vessel‚ the viscosity of the blood and the length of the vessel. You will be asked to systematically examine each of these factors to determine their effect on blood flow. Getting Started: Login to a CAL lab computer using ZULU Open the PhysioEx program From
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perfumes‚ flavorings‚ colorings‚ and medicines. Another type of acyclic acid is methanol‚ and it is also the simplest sort of alcohol. It is a clear liquid that resembles ethanol is odor and properties‚ but it has a slightly lower boiling point of 64.7℃. Methanol is mainly used as a solvent‚ antifreeze‚ raw materials‚ fuel‚ or as a denaturant for ethanol. Unlike ethanol‚ methanol is extremely toxic since one sip of methanol can cause permanent blindness. Two other kinds of acyclic acid are propan-2-ol
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Physio Cardio Lab Report Answers Activity 1 Questions: 1. Explain how the body establishes a pressure gradient for fluid flow. Pressure gradient is the flow rate of a liquid through a pipe. This is directly proportional to the difference between the pressures at the two ends of the pipe and inversely proportional to the pip’s resistance. The pressure gradient is directly dependent upon blood vessel radius which essentially controls blood flow. The bigger the blood vessel radius‚ the more
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still for 15 minutes. we then added the product in a beaker than contain 10 grams of ice. We then vacuum filter the product and wash the crystals with cold water and cold methanol. We then began the recrystallization process. During the recrystallization process‚ the product was a white chucky large crystals‚ when the boiling methanol was added there was a color change from white to yellow. The color change was due to the conversion of aromatic properties. We then place solution in an ice bath to recrystallize
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SC/CHEM 3001 3.0 Experimental Chemistry II Experiment A4: Palladium Catalysis: The Suzuki Reaction Abstract In this experiment‚ the Suzuki reaction was performed using phenylboronic acid‚ p-iodophenol and Pd/C catalysis in potassium carbonate aqueous media to synthesize biphenyl-4-ol. The yield of final product was only 11.94% and the measured melting point was 170-175℃. Since the appearance of the product was significantly different from expected light tan color and the measured melting
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Measure the weight of each individual and place in a 1.5 mL microfuge tube. Place this tube directly into liquid N2 to freeze plant tissue. 2) Remove tubes from the liquid N2 and quickly grind the plant tissue with a pestle. Add 300 L of Methanol 1%HCl and continue to grind the plant tissue. Allow extraction to occur overnight in a dark refrigerator. 3) Add 200 L Milli-Q H20 to each tube. Next‚ go to the fume hood and add 500 L of chloroform to each tube. Spin the tubes in a centrifuge
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to be made between the IR spectrum for the unknown product‚ as well as the frequencies of methanol and of the unknown plastic. Knowing that methanol has a similar backbone structure as nylon‚ carbon-hydrogen bonds and carbon-oxygen bonds are present within the structure. The unknown plastic‚ however‚ does not contain any of the carbon-oxygen bonds‚ carbon-hydrogen bonds‚ or nitrogen-hydrogen bonds. Methanol had major peaks at approximately 3300 cm-1‚ 2900 cm-1‚ and 2750 cm-1‚ which were relatively
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