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I need help finding the therotical yield and the percent yield by finding the limiting reagent based on the data i need the step by step calculations  benzaldehyde 1.0 ml 20% NAOH 10 ml  95% ethanol 7.6 ml

I need help finding the therotical yield and the percent yield by finding the limiting reagent based on the data i need the step by step calculations  benzaldehyde 1.0 ml 20% NAOH 10 ml  95% ethanol 7.6 ml

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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I need help finding the therotical yield and the percent yield by finding the limiting reagent based on the data i need the step by step calculations 

benzaldehyde 1.0 ml

20% NAOH 10 ml 

95% ethanol 7.6 ml 

 

Mass of fitter paper(crude): 0,184 Mass of filter paper + crude product:1.211g Mass of filter paper (pure): Oi182g Mass of filter paper + pure producti O,801g Melting point of pure product: I 05-WO°C
Transcribed Image Text:Mass of fitter paper(crude): 0,184 Mass of filter paper + crude product:1.211g Mass of filter paper (pure): Oi182g Mass of filter paper + pure producti O,801g Melting point of pure product: I 05-WO°C
Synthesis of Dibenzalacetone (1,5-Diphenyl-14-pentadien-3-one) By Mixed-Aldol Condensation General Equation: СНО NaOH (aq) + 2 H20 58.09 z84.79 g/mol General Procedure: Into a clean 25 mL round-bottom-flask (RBF) equipped with magnetic stirring bar place 4.0 mL of 10 % sodium hydroxide solution, and add 3.2 mL of 95 % ethanol, 40 mL of benzaldehyde. Finallý add 0.15 mL of acetone to the reaction mixture. Cap the RBF and mix the reaction mixture continuously for 30 minutes. If no solid product forms, open the container and scratch inside the RBF, under the liquid with a glass rod. After 30 minutes, remove the liquid from the vial using a Pasteur pipette by squeezing the bulb of the pipette, pressing the pipette tip flat against the bottom of the vial, and bringing the liquid up while leaving the crystals in the RBF. Add 4.0 mL of cold water, cap the RBF, and swirl the RBF to wash the crystals. Remove this wash liquid, as you did previously with the pipette method, and wash the crystals twice more with water. After the third wash, make sure not to leave any water behind. Determine the weight of the crude slightly wet product. Add minimum amount of hot 95 % ethanol until all solid dissolves. When all the solid has dissolved, slowly cool the liquid in the vial/RBF to recrystallize. Finally cool the vial/RBF in ice and remove the excess liquid with the pipette. Wash with 1.0 mL of ice cold ethanol while the flask is in ice. Dry the product by placing the solid in a small Buchner Funnel. Determine the final weight of dry product. Calculate the percent yield, and percent recovered from recrystallization, and report the melting point range of your product. Obtain UV spectrum of your sample. Indicate the lmax of the compound.
Transcribed Image Text:Synthesis of Dibenzalacetone (1,5-Diphenyl-14-pentadien-3-one) By Mixed-Aldol Condensation General Equation: СНО NaOH (aq) + 2 H20 58.09 z84.79 g/mol General Procedure: Into a clean 25 mL round-bottom-flask (RBF) equipped with magnetic stirring bar place 4.0 mL of 10 % sodium hydroxide solution, and add 3.2 mL of 95 % ethanol, 40 mL of benzaldehyde. Finallý add 0.15 mL of acetone to the reaction mixture. Cap the RBF and mix the reaction mixture continuously for 30 minutes. If no solid product forms, open the container and scratch inside the RBF, under the liquid with a glass rod. After 30 minutes, remove the liquid from the vial using a Pasteur pipette by squeezing the bulb of the pipette, pressing the pipette tip flat against the bottom of the vial, and bringing the liquid up while leaving the crystals in the RBF. Add 4.0 mL of cold water, cap the RBF, and swirl the RBF to wash the crystals. Remove this wash liquid, as you did previously with the pipette method, and wash the crystals twice more with water. After the third wash, make sure not to leave any water behind. Determine the weight of the crude slightly wet product. Add minimum amount of hot 95 % ethanol until all solid dissolves. When all the solid has dissolved, slowly cool the liquid in the vial/RBF to recrystallize. Finally cool the vial/RBF in ice and remove the excess liquid with the pipette. Wash with 1.0 mL of ice cold ethanol while the flask is in ice. Dry the product by placing the solid in a small Buchner Funnel. Determine the final weight of dry product. Calculate the percent yield, and percent recovered from recrystallization, and report the melting point range of your product. Obtain UV spectrum of your sample. Indicate the lmax of the compound.
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