organicchemistryfinalreview - 1. The more soluble a...

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1. The more soluble a component is in the mobile phase (eluent/solvent), the faster it will be transported along the stationary phase (alumina/silica), this allows components to be separated by thin layer chromatography based upon their solubility properties and their attraction to the stationary phases. 2. a) A short fizzing with the production of a foamy white substance occurred after the addition of 6 M HCl to the solution of sodium salicylate. This was the Aspirin separating. b) The change was the reprotonation of sodium salicylate to form Aspirin, which is insoluble in water, therefore, they separated and Aspirin precipitated out of solution. 3. a) 2.20 g * (100 mL / 5.0 g) = 44 mL b) 44 mL * (0.54 g / 100 mL) = .2376 g * Not asked, but if he does* c) Max solid you can recover? 2.2 - .2376 = 1.9624 g 4. After the solution has been through a simple distillation, you will need to prepare a capillary tube to determine the melting point and then use the density of the unknown to confirm your result based upon the melting point. 5. a) b) 6. a) 7. 2-bromo-2-methylpropane + AgNO3 + ethanol ethyl- tert-butyl ether + isobutylene + AgBr (s) 8. a) Eugenol is a phenol because it has a hydroxyl group attached to a phenyl ring. The position of this hydroxyl group is significant in that it allows eugenol to be fairly acidic in comparison to acetyleugenol. This is exploited by treating the crude mixture with a weak base (5% NaOH) that's not strong enough to react with
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This note was uploaded on 09/07/2010 for the course CHEM CH 2123 taught by Professor Heemoonpark during the Summer '10 term at Austin Community College.

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organicchemistryfinalreview - 1. The more soluble a...

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