CHEM 237 –Organic Chemistry Laboratory I [Majors]
Experiment #3 –Base/Base Extraction
Worksheet
Name: ______________________________________________________________
TA: ________________________________________________________________
Comparison of Solvent Densities
Ether _________g/mL
Source: _____________________________________
Water __________g/mL
Source: _____________________________________
pKa Values of the Conjugate Acids of the Bases Used
pKa of H2CO3 __________
Source: ____________________________________
pKa of H2O __________
Source: ____________________________________
Extraction Results –Benzoic Acid
 Amount present in original sample ______________________________________
 Amount isolated ______________________________________________________
 Percent recovery ______________________________________________________
 Appearance of isolated material ________________________________________
 Melting point of isolated material _______________________________________
 Mass of recrystallized material __________________________________________
 Appearance of recrystallized material ____________________________________
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 Melting point of recrystallized material __________________________________
 Literature melting point _______________________________________________
 Literature source _____________________________________________________
Extraction Results –2-Naphthol
 Amount present in original sample ______________________________________
 Amount isolated ______________________________________________________
 Percent recovery ______________________________________________________
 Appearance of isolated material ________________________________________
 Melting point of isolated material _______________________________________
 Mass of recrystallized material __________________________________________
 Appearance of recrystallized material ____________________________________
 Melting point of recrystallized material __________________________________
 Literature melting point _______________________________________________
 Literature source _____________________________________________________
Extraction Results –Naphthalene
 Amount present in original sample ______________________________________
 Amount isolated ______________________________________________________
 Percent recovery ______________________________________________________
 Appearance of isolated material ________________________________________
 Melting point of isolated material _______________________________________
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 Mass of recrystallized material __________________________________________
 Appearance of recrystallized material ____________________________________
 Melting point of recrystallized material __________________________________
 Literature melting point _______________________________________________
 Literature source _____________________________________________________
Please copy in your handwriting the following statement and sign in the box below.
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Statement Box:
Signature _____________________________________________________
Lab Grade
Pre-lab quiz
Worksheet
Lab notebook
Post-lab
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