Calculations 220mg of Resorcinol, 0.25 Ethyl Acetoacetate, 3 mL toluene yielded a Mass of Coumarin = 0.150g Theoretical Yield Actual yield Mass of A Percent yield Yield due to A = Molar mass of A Yield due to Ethylacetoacetate Yield= Yield due to Resorcinol = * 100 Yield= * Molar Mass of product 0.25g 130.14 g mol 0.220g 110.1 g/mol * 260.34 * 260.34
Calculations 220mg of Resorcinol, 0.25 Ethyl Acetoacetate, 3 mL toluene yielded a Mass of Coumarin = 0.150g Theoretical Yield Actual yield Mass of A Percent yield Yield due to A = Molar mass of A Yield due to Ethylacetoacetate Yield= Yield due to Resorcinol = * 100 Yield= * Molar Mass of product 0.25g 130.14 g mol 0.220g 110.1 g/mol * 260.34 * 260.34
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Can someone help me with this lab for my synthesis of coumarin.
I need to calculate the percent yield, but IDK what my theoretical yield is.
I have listed my starting materials and their literature and some of my own thoughts, any help would be appreciated
Transcribed Image Text:Calculations
220mg of Resorcinol, 0.25 Ethyl Acetoacetate, 3 mL toluene yielded a Mass of Coumarin =0.150g
Theoretical Yield
Actual yield
Mass of A
Percent yield
Yield due to A
=
Molar mass of A
Yield due to Ethyl Acetoacetate
Yield=
Yield due to Resorcinol
* 100
* Molar Mass of product
0.25g
g
mol
130.14.
0.220g
110.1 g/mol
Yield=
Why was toluene added?
* 260.34
* 260.34
Transcribed Image Text:Compound
Ethyl acetoacetate
Resorcinol
Amberlyst-15 resins
7-hydroxy-4-methylcoumarin
HODOH GOE
НО
ОН
+
MW
130.14
110.1
Amberlyst-15
toluene
260.34
Mp
HO
110°C
Figure 27: 7-hydroxy-4-methylcoumarin Synthesis from Resorcinol & Ethyl Acetoacetate
180-182 °C
Bp
180°C
Density
1.021
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