Recrystallization lab report

Experiment 1: Recrystallization – Evaluation Summary

Last Name: Xavier
First Name: Jessica
Date: October 1st 2013
Lab Day/TA/Group: Wednesday(1:35pm)/Group A

Labs reports must be typed and chemical structures must be drawn with ChemDraw. Report must not exceed three pages (including this page). Page limit does not include any attached spectra or references.
** Deductions for hand written report/structures and exceeding page limit **

Report Breakdown Data/Results: _________________ /10

Discussion: _________________ /10

Report Total: _________________ /20

Other Lab Marks Performance: _________________ /6

Prelab Quiz: _________________ /3

TA Comments on Report/Performance

Report assessment
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TA (signature):

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Experiment 1: Recrystallization – Report Sheet

Last Name: Xavier
First Name: Jessica
Date: October 1st 2013
Lab Day/TA/Group: Wednesday(1:35pm)/ Group A
Data: 10 marks

MP: 169 – 172 C

Reactants:
Amount p-aminophenol used: mass 1.20g mol 0.0110 mol
Amount acetic anhydride used: mass 1.31 g mol 0.0128 mol
(Show Calculations) p-aminophenol amount calculation: Mol=Mass(g)/Molecular weight(g/mol)=
1.20g/(109 g/mol)=0.011 mol acetic anhydride amount calculation: Mass(g)=Volume(mL)xDensity(g/mL)=1.20mLx1.09g/mL=1.31g
Mol=Mass(g)/Molecular weight(g/mol)=1.31g/(102 g/mol)=0.0128 mol
Product:
Theoretical Yield of Tylenol: mass 1.66 g mol 0.0110 mol
(Show Calculations)
Above we see acetic anhydride exists in excess and p-aminophenol is the limiting reagent, therefore #mol p-aminophenol=#mol acetaminophen produced.
Theoretical yield; Moles acitaminophen x Molar mass acetaminophen=0.0110 molx151 g/mol= 1.66g
Table 1. Recrystallization Data

Crude Tylenol
Purified Tylenol
Yield (g)
0.480 g
0.200 g
Yield (%)
30.0%
12.5%
Appearance
Light reflecting, off white/gold, small

References: -http://danielleamorim.tripod.com/ -McGill CHEM 212 Recrystallization lab manual/mycourses