CHE 2612 Organic Chemistry 1 Lab
Experiment 1-Post-Lab - Recrystallization and Melting Points
Name_______
Session______
DUE to be submitted to Canvas before the start of your next week’s lab section.
1. Melting point data
Benzoic acid____________
Unknown ______________
2. What is the Unknown based on the M.P. data? Write out the name and draw the
structure with ChemDraw.
3. Show the calculation of % recovery:
(1) Benzoic acid
(2) Unknown
4. Answer following questions:
a. Acetanilide has a melting point of 113-114°C. What affect would be observed on the
melting point if mixed with trans-cinnamic acid that has a melting point of 132-133°C?
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CHE 2612 Organic Chemistry 1 Lab
b. Rank the following compounds in order of increasing melting point (1 being the lowest
and 3 being the highest). List the intermolecular forces present in each molecule
c. List the properties of a good recrystallization solvent.
d. What is the purpose of slow cooling of the hot mixture to allow the crystals to form?
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