CHEM 12A—Trego
Crystallization of Sulfanilamide and Fluorene
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Abstract
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Part A
Melting Point Data
Impure Sulfanilamide
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Crystallized Sulfanilamide
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Based on the melting point of the crystallized sulfanilamide, was it pure? How do you know? (You should
compare the experimental melting point to the literature value.) As well, comment on the color of the
product and what it suggests about the purity of the crystallized sulfanilamide.
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Mass Data
Mass of Impure Sulfanilamide
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Mass of Crystallized Sulfanilamide
Percent Recovery
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Comment on the percent recovery and propose possible sources of product loss.
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Part C
Describe the results of finding the best solvent for the crystallization of fluorene.
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Explain the results for finding the best solvent in terms of polarity and solubility.
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Melting Point Data
Impure Fluorene
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Crystallized Fluorene
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Mass Data
Impure Fluorene
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Crystallized Fluorene
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Percent Recovery
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Comment on the percent recovery and propose possible sources of product loss.
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The solubility of fluorene in each of the three solvents used in Part C corresponds to one of the three
curves shown in figure 11.1 (Technique 11). Identify which curve in 11.1 best describes the solubility of
fluorene in each of the three solvents.
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Questions
Respond to questions 1-3 on page 33 of Pavia
Question 1
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Question 2
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Question 3
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