The Extraction Procedure For Separate The Acid, Base And Neutral Components Of The Solution Into Separate Phases

The Extraction Procedure For Separate The Acid, Base And Neutral Components Of The Solution Into Separate Phases

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The extraction procedure was undertaken in order to separate the acid, base and neutral components of the solution into separate phases. This procedure was executed using different solvents with different polarities in order to extract the different solutes. The recrystallization procedure was undertaken in order to purify the solutes further by removing any contaminants. This was done by using hot solvent and then allowing it to cool, which causes the compound to precipitate out. This creates purified crystals that have less other associated compounds.

Data and Results
The initial mass of the acid was 0.33 grams. The pure mass that was measured after recrystallization was 0.127 grams, which gives a recovery percentage of 38.5%. The melting point of the purified crystals was found to be between 157C and 160C. As the melting point of salicylic acid is between 158C and 160C, it is likely that the acid is salicylic acid. The initial mass of the base was 0.33 grams. The pure mass that was measured after recrystallization was 0.125 grams, which gives a recovery percentage of 37.9%. The melting point of the purified crystals was found to be between 142C and 145C. As the melting point of 4-niroaniline is between 149C and 151C, it is likely that the base is 4-nitroaniline. The initial mass of the neutral solute was 0.33 grams. The pure mass that was measured after recrystallization was 0.132 grams. This gives a recovery percentage of 40.0%. The melting point of the purified crystals was found to be between 72C and 75C. As the melting point of 9-fluorenone is between 82C and 85C, it is likely that the neutral solute is 9-fluorenone.

Discussion and Conclusion
Extraction is performed by using different immiscible solvents to move a cer...


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... be removed by filtration after the solute has dissolved.
This experiment did demonstrate the above theory and principles. The three solutes, the acid, base and neutral, were able to be extracted using different solvents and were then able to be further purified using the recrystallization technique. They were not extracted fully, however, because the percent yields were only 38.5%, 37.9%, and 40.0% for the acid, base and neutral solutes respectively. Since only approximately 40% of each solute was extracted, that means the rest was left in the other phases of the extraction or were not crystallized out of solution during the recrystallization. This could have been due to incomplete extraction of the extraction solutions during the extraction procedure or from incomplete cooling in the recrystallization. However, overall, the expected principles were demonstrated.

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