Recrystallization Of Acetanilide Lab Report

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Recommended: Preparation of Acetanilide

Title and Authors
Recrystallization
Devon King
Jean Kim
Chemistry 237-536
Results and Discussion
The product given, Acetanilide, was an impure product from a chemical reaction. It was purified through the process of recrystallization, where by-products and impurities were removed from the solid. This process gives a purer compound than what was originally given. Recrystallization is able to be used due to the solubility of the impure compound. Ideally, the whole solvent would completely dissolve in the water when the proper boiling point was reached. In this lab, the Acetanilide was soluble thusly this process would work properly. The end product of creating a pure substance was purified crystals.
The percent recovery was determined to find what percent of Acetanilide was recovered during recrystallization. At the beginning of the lab, 1.612grams of Acetanilide was weighed out. The dry crystals of Acetanilide weighed 0.979grams. The calculation goes as it is written below: Percent Recovered = (grams of …show more content…

The melting point helps to determine how close to a pure compound the extracted crystals were. When the dry crystals of Acetanilide were melted, they were found to have a melting point of 119.5°C. The melting point of pure Acetanilide that is recorded in literature is reported between 113-115°C. Knowing that this is the range of the melting point, it is possible that the Acetanilide recovered is relatively pure. The melting point found might not be in the reported range due to some errors throughout the laboratory procedure. Some errors that may have been possible are as follows: not completely dissolving the solvent, using too little solvent, improper weighing of original solvent, placing the solvent into the ice bath before it was completely cooled to room temperature, and not identifying where the crystals had completely

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