Dissolved in Diethyl Ether Benzoic acid and Tert-butylbenzene Add an aqueous and basic solution of NaOH then stir and separate the phases salt (cojugated base) dissolved in water kaqueous phase) of alkaline pH. lower phase dissolved in diethyl ether (organic phase),contains water residues. upper phase It is acidified with 50% HCI to protonate the conjugate base which is insoluble in water Magnesium sulfate is added anhydrous (MgSO) to dry

After purification via extraction, any organic substance should be rigorously dried; otherwise, its further purification via recrystallization will often fail to achieve the desired result.  In a typical purification of an organic unknown, a solution of crude product in an organic solvent (i.e. diethyl ether) is what will remain following extraction.  Suggest a simple means to remove small quantities of water from this solution.

assuming that charcoal and sugar are the main impurities in a sample of crude acetanilide explain how recrystallization from water would remove each.

Balance the following sodium borohydride reduction equations showing the structures for the following organic compounds: a.) benzil to benzoin; and b.) benzil to hydrobenzoin. Calculate the theoretical amount of NaBH, needed to convert 100 mg of a.) benzil to benzoin; and b.) benzil to hydrobenzoin.

.What volume of 1.37 M nitric acid is needed to convert 9.0 g of  m-bromophenol to 3-bromo-4,6-dinitrophenol? (No excess of nitric acid is  used.) Specify the units on the volume.

a) To a solution of 10 g (60 mmol) of 3-nitrophenylacetic acid in 120 ml of ethanol were added 20 ml of a saturated 5 solution of hydrogen chloride in ethyl acetate and the mixture was heated at reflux for 4 hours, cooled and left to stand at room temperature for 18 hours. The mixture was evaporated and the residue was partitioned between 120 ml of diethyl ether and 100 ml of saturated aqueous sodium 10 bicarbonate solution. The organic phase was dried over magnesium sulfate, filtered and evaporated to give 10.3 g. (82%) of ethyl 3-nitrophenylacetate as a pale yellow oil. [NMR spectrum (250 MHz) 81.25(t) (3H), 83.68(s) (2H), 84.6(q) (2H), 86.5-86.7(m) (3H), 87.09(dd) (1H)].