Part A: Calculate the theoretical yield for this experiment (show work clearly) Part B: Explain why bromoethane was added last (Please type your answer) 1.063 g of p-acetamidophenol was measured out into a 50 mL round bottom flask along with 8 mL of 1M NaOH in ethanol and a stir bar. This mixture was heated at reflux for 15 min. It was allowed to cool and then 0.80 mL of bromoethane was added to the reaction. The mixture was then heated at reflux for another 15 min. After heating, the solution was poured onto a mixture of ice and water and further cooled on ice and then the solid was collected by vacuum filtration. This solid was then recrystallized from ethanol and water. The final mass of the purified phenacetin was 0.42250 g

Part A: Calculate the theoretical yield for this experiment (show work clearly) Part B: Explain why bromoethane was added last (Please type your answer) 1.063 g of p-acetamidophenol was measured out into a 50 mL round bottom flask along with 8 mL of 1M NaOH in ethanol and a stir bar. This mixture was heated at reflux for 15 min. It was allowed to cool and then 0.80 mL of bromoethane was added to the reaction. The mixture was then heated at reflux for another 15 min. After heating, the solution was poured onto a mixture of ice and water and further cooled on ice and then the solid was collected by vacuum filtration. This solid was then recrystallized from ethanol and water. The final mass of the purified phenacetin was 0.42250 g

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter88: Column Chromatography

Section: Chapter Questions

Problem 5P

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Can you answer this question please: Explain why bromoethane was added last (Please type your answer) 1.063 g of p-acetamidophenol was measured out into a 50 mL round bottom flask along with 8 mL of 1M NaOH in ethanol and a stir bar. This mixture was heated at reflux for 15 min. It was allowed to cool and then 0.80 mL of bromoethane was added to the reaction. The mixture was then heated at reflux for another 15 min. After heating, the solution was poured onto a mixture of ice and water and further cooled on ice and then the solid was collected by vacuum filtration. This solid was then recrystallized from ethanol and water. The final mass of the purified phenacetin was 0.42250 g
A student forgot to add the mass of the unknown solute in trial 1 to the mass of the solute that was weighed for trial 2 and then added to the cyclohexane-solute solution used in trial 1. How would this omission affect the calculated molecular weight of the solute?
Please explain and show work step by step Twenty dietary iron tablets with a total mass of 131 g were ground and mixed thoroughly. Then 2.998 g of the powder were dissolved in HN03 and heated to convert all the iron to Fe3+ . Addition of NH3 caused quantitative precipitation of Fe2O3 x H20, which was ignited to give 0.264 g of Fe2O3 ( FM 159.69). What is the average mass of FeS04.7H20 ( FM 278.01) in each tablet? Consider a mixture of the two solids BaCl22H20 (FM 244.26) and KCl (FM 74.551). When the mixture is heated to 160 °C for 1 h, the water of crystallization is driven off. A sample originally weighing 1.7839 g weighed 1.5623 g after heating.
In an EAS Reaction the compounds 5.0g of acetanilide, 0.2g potassium bromate, 5ml acetic acid, 0.9 ml hydrobromic acid solution, and 5 ml saturated sodium bisulfite solution are used. Given these compound and obtaining a yield for the experiment at 6.3 grams which yields 5.3 grams after recrystallization and drying, Please find the theoretical yield and the percent yield?
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Please, I need help to calculate the %yield of this experiment. These is my values obtained in the laboratory : volume of cyclohexanol = 7.39mL ; mass of cyclohexanol = 7.112 g mass of cyclohexanone obtained = 1.535 g Thymol blue = 3 drops volume of Sodium Bisulfite = 1mL volume NaOH used = 20mL
1. The heat flows measured in this experiment were actually not for the simple neutralization of a proton and hydroxide ion (as indicated in the Introduction for Choice Ill); rather they include contributions based on the fact that these species are hydrated in aqueous solution. What does it mean to say that a proton is hydrated, and how will the heat of hydration affect the measured heat flow for a neutralization reaction?
a) If you inject your sample into the Gas Chromatography and wait several minutes but there is no peak (at all, not even an air peak), what could be the reason for this? How might you solve this problem? b) If you inject your sample into the Gas Chromatography and there is a peak from air in the syringe, but no peaks due to the expected compounds, what could be the reason for this? How might you solve this problem?
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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.