Describe some observations you found fascinating. Discuss the purpose of acquiring a melting point and what it means to a budding scientist, like you! Discuss how we might have lost material in the experiment (i.e. operational error)? List the two major functional groups ( and ) present in the structure of acetylsalicylic acid. Weight of tablet = 2grams Weight of ASA recovered or isolated = 100mg. Please answer those 2 not graded thanks

Describe some observations you found fascinating. Discuss the purpose of acquiring a melting point and what it means to a budding scientist, like you! Discuss how we might have lost material in the experiment (i.e. operational error)? List the two major functional groups ( and ) present in the structure of acetylsalicylic acid. Weight of tablet = 2grams Weight of ASA recovered or isolated = 100mg. Please answer those 2 not graded thanks

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter81: Extractions, Separations, And Drying Agents

Section: Chapter Questions

Problem 8P

See similar textbooks

Similar questions

WHAT FACTORS CAN AFFECT THE YIELD OF BENZOIN CONDENSATION? PROCEDURE To a six inch test tube was added thiamine hydrochloride (0.65 g), followed by water (2mL). The mixture was gently shaken until homogeneous, and then ethanol (7.5 mL)was added. Finally, sodium hydroxide (10%, 1.5 mL) was added and the mixture wasgently stirred to ensure complete mixing.Benzaldehyde (3.8 mL) was then added at room temperature in one portion with gentlestirring. The pH of the resulting reaction mixture was determined and adjusted to >10by dropwise addition of 10% sodium hydroxide. The reaction mixture was then partiallysubmerged in a 65 °C water bath2 and the progress of the reaction was periodicallymonitored by TLC analysis.Once TLC analysis indicated that the reaction was complete, the reaction mixture wascooled to approximately room temperature, and then chilled in an ice-water bath. Theresulting precipitate was collected by vacuum filtration and air-dried. The crude productwas purified by…
We want to extract terpenoids from an aqueous sample by continuous liquid-liquid extraction. Which of the following solvents is not suitable for this purpose? Why? Propanone (acetone), dichloromethane, heptane.
Please type all of the parts to this question occordingly to the instructions. Here is an example of a formal procedure based off of the experiment presented in Mohrig:Sodium hydroxide (4.6 g) was dissolved in water (25 mL). This solution was added to a 100 mL round bottom flask along with methyl salicylate (2.0 mL) and a stir bar. The mixture was heated at reflux for 15 min and then progressively cooled to 5 °C. The solution was acidified with 3M sulfuric acid (15-20 mL), and the resulting solid was collected by vacuum filtration. The crude salicylic acid was recrystallized from water to yield ???? g of final solid. The melting point and IR were taken to assess purity. Calculate the molarity of the solution of sodium hydroxide that is used.a. M = b. If the original procedure is the base scale (100%), how far are we scaling down the reaction when using 0.75 mL of methyl salicylate? (Example: the original uses 2.0 mL, if we were to use 1.0 mL, we would be scaling the reaction down…
2. Describe and explain the effect(s) on your result for the following possible experimental errors. In each case, specify the component(s) whose percentage(s) would be too high or too low and explain your rationale why these would be changed. (a) After adding DCM to the counterfeit pharmaceutical at the beginning, you didn’t stir or shake the mixture before filtering. (b) Washing the sucrose recovered during the first vacuum filtration with water rather than DCM. (c) During the NaHCO3 extraction, you failed to mix the organic and aqueous layers thoroughly. (d) You mistakenly extracted the DCM solution with 5% HCl rather than 5% NaHCO3. (e) You neutralised the NaHCO3 solution to pH7 rather than pH2.
Consider a mixture containing 0.5 g of benzil and 0.05 g of benzoin. Your task is to isolate benzil in a pure form. Could you accomplish this using an extraction procedure? If yes, explain how you would do this. If not, suggest another technique that would accomplish this.
Each of the student statements below is wrong. Explain why they are not correct. (a) All my compound dissolved right away in the small amount of solvent I added at room temperature, and I didn’t need to heat it at all. This means I’m going to get lots of pure compound out. (b) I did a recrystallization of naphthalene and my percent recovery was very high (99%), so I must have pure product. (c) When you’ve dissolved all your compound in hot solvent, and you’re in a hurry, it’s ok to just place it straight into the ice bath.
1.For this part of the experiment, watch the video on the link below: https://www.youtube.com/watch?v=eX3JiKmenuU&t=7s 2.Note the color of the cupric sulfate pentahydrate before and after heating. Question: Observations before heating. Observations after heating.
A student rushed through this experiment. Describe the effect that the following procedural changes would have on the percent recovery of acetanilide. Briefly explain the basis of each answer.(a) Rather than adding 0.5-mL portions of boiling solvent to the acetanilide, the student added 5-mL portions of boiling solvent.(b) The student did not pre-heat the gravity filtration apparatus.(c) The student forgot to cool 5 mL of solvent in Part 5 and washed the crystals with room-temperature solvent.
An organic chemistry laboratory Extraction; the extraction of crude naphtalene- benzoic acid mixture. Naphthalene is a suspect carcinogen and is toxic to aquatic life. Find an alternative pair of molecules that adhere better to the principles of green chemistry and can be separated by extraction using green' solvents. (kindly answer fully)
You suspect a given substance, unknown X, to be either pure acetaminophen (melting point = 169°C) or pure 1,4-dihydroxybenzene (melting point = 172°C). Subsequently, you perform a mixed melting point analysis by making the following three samples that yield the results below: · - Unknow X alone yielded a melting range of 165-169°C · - Unknown X mixed in a 50/50 ratio with acetaminophen yielded a melting range of 154-162°C · - Unknown X mixed in a 50/50 ratio with 1,4-dihydroxybenzene yielded a melting range of 169-172°C Given the data above, what is the identity of unknown X? (Multiple Choice: Only one answer is correct, and only one answer can be selected) A. 1,4-Dihydroxybenzene B.Neither acetaminophen or 1,4-dihydroxybenzene C. Acetaminophen
Which layer (aqueous or organic) would you expect to find 3,5-dimethylaniline in the following liquid-liquid extractions? Explain. Draw chemical structures to help explain your answers. If the structure of themolecule changes in the aqueous solution, then draw the new structure. i. water and dichloromethaneii. aq. NaOH and dichloromethaneiii. aq. HCl and dichloromethane
MAKE A METHODOLOGY : MATERIALS/ REAGENTS WITH SCHEMATIC DIAGRAM . THE PICTURE UPLOADED SERVES AS A GUIDE, DO THE SAME THING BASED FROM THE PIC. 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…