Using the percent purity calculations, determine the percent yield of synthesis of aspirin. Part I Synthesis of Aspirin Mass of salicylic acid used (g) 2.029g Volume of acetic anhydride used (mL) 5ml Mass of acetic anhydride used (vol. × 1.08 g/mL) 5.4g Mass of aspirin synthesized (g) 3.256g Part II Melting Temperature Data Melting temperature (°C) 133°C Part III Salicylic Acid Standard Stock Solution Initial mass of salicylic acid (g) 0.210g Moles of salicylic acid (mol) 0.0147 mol Initial molarity of salicylic acid (M) 0.724 M Part III Beer’s Law Data for Salicylic Acid Standard Solutions Trial Concentration (M) Absorbance Water (mL) 1 10 0.301 0 2 7.5 0.219 2.5 3 5.0 0.163 5.0 4 2.5 0.074 7.5 Best-fit line equation for the salicylic acid standards Test of the Purity of the Synthesized Aspirin Initial mass of aliquot of product (g) 0.210g Absorbance of sample prepared from aliquot 0.081 Moles of salicylic acid in sample (mol) 138.121 g/mol Mass of salicylic acid in sample (g) 2.029g Actual mass of aspirin in sample (g) 3.256g Percent aspirin in sample (%) 62.31%

Using the percent purity calculations, determine the percent yield of synthesis of aspirin. Part I Synthesis of Aspirin Mass of salicylic acid used (g) 2.029g Volume of acetic anhydride used (mL) 5ml Mass of acetic anhydride used (vol. × 1.08 g/mL) 5.4g Mass of aspirin synthesized (g) 3.256g Part II Melting Temperature Data Melting temperature (°C) 133°C Part III Salicylic Acid Standard Stock Solution Initial mass of salicylic acid (g) 0.210g Moles of salicylic acid (mol) 0.0147 mol Initial molarity of salicylic acid (M) 0.724 M Part III Beer’s Law Data for Salicylic Acid Standard Solutions Trial Concentration (M) Absorbance Water (mL) 1 10 0.301 0 2 7.5 0.219 2.5 3 5.0 0.163 5.0 4 2.5 0.074 7.5 Best-fit line equation for the salicylic acid standards Test of the Purity of the Synthesized Aspirin Initial mass of aliquot of product (g) 0.210g Absorbance of sample prepared from aliquot 0.081 Moles of salicylic acid in sample (mol) 138.121 g/mol Mass of salicylic acid in sample (g) 2.029g Actual mass of aspirin in sample (g) 3.256g Percent aspirin in sample (%) 62.31%

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter79: Solubility

Section: Chapter Questions

Problem 1P

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Determine the percent yield of the synthesis. The % yield = 81.33 % The Theoretical Yield = 2.65g The Actual Yield = 3.256g Part I Synthesis of Aspirin Mass of salicylic acid used (g) 2.029g Volume of acetic anhydride used (mL) 5ml Mass of acetic anhydride used (vol. × 1.08 g/mL) 5.4g Mass of aspirin synthesized (g) 3.256g Part II Melting Temperature Data Melting temperature (°C) 133°C Part III Salicylic Acid Standard Stock Solution Initial mass of salicylic acid (g) 0.210g Moles of salicylic acid (mol) 0.0147mol Initial molarity of salicylic acid (M) 0.724 M Part III Beer’s Law Data for Salicylic Acid Standard Solutions Trial Concentration (M) Absorbance Water (mL) 1 0.724 M 0.301 0 2 0.724 M 0.219 2.5 3 0.724 M 0.163 5.0 4 0.724 M 0.074 7.5 Best-fit line equation for the salicylic acid standards Test of the Purity of the Synthesized Aspirin…

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Mass of salicylic acid used (g)	2.029g
Volume of acetic anhydride used (mL)	5ml
Mass of acetic anhydride used (vol. × 1.08 g/mL)	5.4g
Mass of aspirin synthesized (g)	3.256g

Initial mass of salicylic acid (g)	0.210g
Moles of salicylic acid (mol)	0.0147 mol
Initial molarity of salicylic acid (M)	0.724 M

Trial	Concentration (M)	Absorbance	Water (mL)
1	10	0.301	0
2	7.5	0.219	2.5
3	5.0	0.163	5.0
4	2.5	0.074	7.5

Initial mass of aliquot of product (g)	0.210g
Absorbance of sample prepared from aliquot	0.081
Moles of salicylic acid in sample (mol)	138.121 g/mol
Mass of salicylic acid in sample (g)	2.029g
Actual mass of aspirin in sample (g)	3.256g
Percent aspirin in sample (%)	62.31%