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- Eugenol, the main component of clove oil, can be prepared by heating 2-allyl guaiacol (in the absence of oxygen) to temperatures >205 °C. In practice, however, it is most cost-effective to extract eugenol from cloves, its natural source. Given a weight percentage of eugenol in cloves at 15.0%, calculate the minimum mass of cloves one needs to obtain 8.00 g of eugenol as a product. Report your answer (as a mass in grams, without units) with three significant digits.MAKE A FLOWCHART/SCHEMATIC DIAGRAM Procedure: Place 20 drops of each of 0.2M CuSO4 in a centrifuge tube. Then add 5 drops of freshly prepared 6M (NH4)2S to each centrifuge tube. Record your observation. Centrifuge the mixtures for 3 mins. and decant the supernatant liquid. Add 10 drops of DI water and 10 drops of 6M HNO3. Stir and boil the mixture in a hot water bath for 5 mins. centrifuge the mixture for 3 mins. Decant the supernatant solution from procedure 3. Discard the To each of the supernatant liquid, add 6 drops of 6M H2SO4. Allow themixtures to cool and 5 drops of DI water. To the mixtures in procedure 4, add few drops of concentrated NH3 until the solution becomes basic. Confirm using a litmus paper. Record your observation. Add 1 drop of 5M NaOH and 1 drop of 0.1 M SnCl2 to the centrifuge tube containing Bi3+ ion , centrifuge and decant the supernatant liquid. To the solution containing Sn 2+ion , add 6M HCl , dropwise in the test tube. Stir well. Add excess HCl in the…The phensuprin solid is first dissolved in ethyl acetate. One solid will be left over – what is it? That solid is collected by gravity filtration. Do we still need the liquid we collect in the flask? What is in it? Next, the ethyl acetate is extracted with 5% aqueous sodium bicarbonate. What will be in each layer? After the extractions, the organic solvent is removed by rotary evaporation. What is the solid that will be collected at this step? What solvent is being removed? We will acidify the bicarb. layer using HCl. How do we know when the aqueous layer has been acidified? A solid forms when the aqueous layer is acidified to pH 2. That solid is collected using vacuum filtration. What is this solid? Create a flow chart depicting the separation of each component of phensuprin as the procedure progresses.
- 1. How to collect main batch of crystals using vacuum filtration (Set-up, things to remember)• Why use small amounts of cold water for washing? What is being washed away (2things)?2. Why measure the volume of mother liquor in a graduated cylinder?3. How to let the main batch of crystals dry/how will they be stored until next week?4. How to collect the small amount of crystals from step 4 (those that were not subjected tocrystallization)• What can we expect of this small batch of crystals compared to the main batch?What is the weight percent of toluene in a mixture of toluene and n-heaxne that has a spevific gravity of 0.832The distillation flask is best completely filled with mixture as large as available never less than half empty about 70% full
- Based on the melting point of your impure solid, you look at the given samples and believe you havecompound A. Compound A is recrystallized using a mixed solvent system of ethanol and water. You add1 ml of hot ethanol to your sample and it doesn’t completely dissolve. You continue to add hot ethanolbut there isn’t any change. Some solid remains. What should you do next?The alcohol content of hard liquor is normally given in terms of the “proof,” which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the number of grams of alcohol present in 1.00 L of 75-proof gin. The density of ethanol is 0.798 g/mL. Round off to 4 sig. figures for all calculations made prior to final answer and the final answer should be in 3 sig. figuresExplain why it is problematic to include a constraint such as the following in an LP model for a blending problem: Total octane in gasoline 1 blend $ divided by Barrels of gasoline 1 blended daily which is greater thanor equal to 10
- Volumetric pipettes are designed to deliver a precise amount of liquid, but only if you a. submerge the end of the pipette into a solution you are delivering. b. allow the pipette to drain freely, and leave any residual solution in the pipette. c. hold the pipette at a 45 degree angle and ensure that all the liquid is delivered.A core sample is saturated with an oil (?o = 35oAPI), gas and water. The initial weight of the sample is 224.14 g. After the gas is displaced by water (?w = 1 g/cm3 ), the weight is increased to 225.90 g. The sample is the placed in a Soxhlet distillation apparatus, and 4.4 cm3 water is extracted. After drying the core sample, the weight is now 209.75 g. The sample bulk volume, 95 cm3 is measured in a mercury pycnometer. Find the porosity, water saturation, oil saturation, gas saturation and lithology of the core sample.Prior to fat analysis, two samples: Sample 1 and Sample 2 with the initial weight for each sample=2.50g. After pre-dried, samples were grinded and reweighted; s1-2.15g and s2=2.11g. Samples were placed in dried glass wool in each thimble and placed extractor for 4-5 hours. Samples were then dried and cooled in desiccators before another weight recorded. The weight for s1=93.51g and for s2=93.78g #Weight of round bottom flask (with glass wool+ thimble) (g) = 92.00 #Weight of round bottom flask (g) =91.00 1) Calculate the percentage of dried fat in s1 2) Calculate the percentage of dried fat in s2. 3) Sample 3 have dried fats of 50%. Identify the correct sequence from the highest to the lowest % of dried fats in sample.