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Objective

To determine the solubility of 2,3-dihydroxybenzoic acid in Methanol,Ethanol, Acetonitrile,THF, Toluene and DMSO.

Procedure

Result

Discussion

Conclusion

This experiment had to be aborted since the NMR could not be taken.

Log

2009-05-16
12:35 Labeled 6 half dram vials 1A to 6A.
12:50 Placed a small amount of the solute and the six major solvents: Methanol, Ethanol, Acetonitrile, THF,Toluene and DMSO.
13:00 Vortexed the vials for 15 seconds.
13:05 Placed vials in the sonicator for 30 minutes at T=25C.
13:35 Removed vials from the sonicator at T=28C.
13:50 Vials 4A and 6A were observed to be completely dissolved, hence they were revortxed and resonicated. T=28C.
14:20 Vials were removed at T=29C.
14:50 Vials were centrifuged for 2-3 mintues.
15:00 Vials were transferred into clean dry test tubes with 0.7uM chloroform-D added to it.

2009-05-23
12:15 It was observed that the supernatents in test-tubes 1A to 4-A turned had solid in it, hence the NMR could not be taken.