Jennie K. Daniels Organic Chemistry 2121 11 February 2014 Synthesis of Aspirin Salicylic acid derivatives‚ or salicin‚ are found in the bark of the willow tree. In the 5th century B.C.‚ Hippocrates ground the bark into a powder‚ and later‚ the Natives Americans chewed on the bark to alleviate fever and pain1. In the 19th century‚ a German chemist by the name of Felix Hoffman wanted to find a medication that would ease
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Funnel 5. 125 mL Erlenmeyer flask 6. 50 mL buret 7. Ring stand 8. Strong acid 9. Weak base 10. Phenolphthalein 11. De-ionized water. PROCEDURES: 1. Fill the buret with a weak base and place it in the ring stand. 2. Fill the 50 mL beaker with 30 mL of a strong acid. 3. Fill the 250 mL beaker with 50 mL of de-ionized water. 4. Pour around 9.5 mL of the strong acid into the graduated cylinder. 5. Pour the acid into the Erlenmeyer flask. 6. Pour around
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Pour 200 mL of C2H3N into a 1 L vacuum flask. After mixing and degasing the solutions‚ store the mixture for 21 days at room temperature and pressure (r.t.p.). 2.2.3 Solvent Extraction C2H3N-water Pour 500 mL of water and 500 mL of C2H3N into a 1 L graduated cylinder. Carefully mix the solution
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color change in an added indicator. In a titration‚ the standard solution goes in a buret‚ which is a piece of glassware used to measure the volume of solvent to approximately 0.1 mL of accuracy. The solution that you are titrating goes in an Erlenmeyer flask‚ which should be large enough to accommodate both your sample and the standard solution you are adding. What is an Indicator and What is it Used For? An indicator is any substance
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Phenolphthalein * Distilled water * Two 100mL beakers * 250mL beaker * 100mL volumetric flask with stopper * 50mL buret * 10mL volumetric pipet * Pipet pump * Retort stand * Buret clamp * Funnel * Erlenmeyer flask Procedure 1. Obtain about 30mL of vinegar in a clean‚ dry 100mL beaker. 2. Pipet one 10.00mL portion into a clean 100mL volumetric flask and dilute to the mark. 3. Stopper and invert several times to mix thoroughly. 4. Obtain about
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2.2.4 Inoculum preparation: Inoculum was prepared in a 250 ml Erlenmeyer flask containing 50 ml ATCC 14 broth medium. After sterilization for 15 min at 121˚C‚ 50 ml YPM medium was inoculated with 250 µl of glycerol culture. The inoculated flasks were incubated on the rotary shaker (Innova 4080‚ New Brunswick Scientific Co.‚ NJ‚ USA) at 200 rpm and 30˚C for 24 h. Cells were used thereafter to inoculate either 250 ml Erlenmeyer flasks or stirred tank bioreactor with inoculum concentration of 10% (v/v)
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extraction) The weight of tea leaves used and empty evaporating dish was obtained using an analytical balance. Fig. 1. Extraction set-up 2. Extraction A solution of 4.4 g anhydrous sodium carbonate and 100 ml distilled water in an Erlenmeyer flask was heated in a water bath
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Discussion: Extraction and crystallization- The purpose of this lab was to extract and crystallize compounds in a mixture using acids and bases. 1 gram of the unknown was dissolved into 30 mL of ethyl acetate. The mixture was then transferred to a separatory funnel. Using aqueous solutions of different pH we were able to separate organic acids‚ bases and neutral compounds from each other. Using three 10 mL portions of HCl‚ we reacted the HCl with the base in solution. This made it possible to
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vinegar should have a pH of around 5. Weigh the initial mass of 6 balloons using the same scale as before. Pour the altered solution into the six balloons making sure to label each balloon as either acidic or basic. Attach the balloons to the six erlenmeyer flask containing the liver
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Experiment 1: Calibration of Volumetric Glassware Introduction: Volumetric glassware is used to accurately measure volumes. Despite all of the tools and instruments available for the use of measuring values of various data‚ it is impossible to measure the true value of anything. This experiment is intended to develop a person’s capacity to handle volumetric glassware. One must understand how to handle volumetric glassware to acquire the best possible data from the equipment used in lab. Although
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