Researcher

Marshall Moritz

Objective

To generate a solubility-temperature curve for 4-nitrobenzaldehyde in THF, and toluene. This experiment will serve as a compilation of all further data for construction of the 4-nitrobenzaldehyde temperature-solubility curve.
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Procedure

Solutions of known concentration of 4-nitrobenzaldehyde in mixtures of solvents were made by weighing out a known amount of solvent, either 1, 0.5, or 0.25 grams, in a tared half-dram vial. Weighed amounts of 4-nitrobenzaldehyde were added to each vial. Each vial was tightly capped and parafilmed. Vials were set in a thermostated water:ethylene glycol bath until the bath reached 45.0C. The bath was cooled, and the temperature at which each vial showed precipitate was recorded to create a solubility-temperature curve. An NMR spectra was taken of 4-nitrobenzaldehyde in pure toluene to find the solubility at room temperature; vials were made with 200uL of solvent and enough solute such that the solutions were saturated after 30 minutes of sonication. The supernatants were dissolved in 500uL of CDCl3 and the NMR was taken on the 500MHz Varian instrument.

Results


Spreadsheet Exp122NMR


Spreadsheet Exp122

Discussion


Conclusion

[you have enough to conclude JCB]

Log


References

Solubility of 4-nitrobenzaldehyde in non-aqueous solvents

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