1. during extraction, the ether layer was washed with 2.0 mL saturated aqueous s
ID: 786956 • Letter: 1
Question
1. during extraction, the ether layer was washed with 2.0 mL saturated aqueous sodium chloride. Briefly explain the purpose of this step.2. Following the saturated, NaCl wash, a small amount of anhydrous sodium sulfate was added to the ether. Briefly explain the purpose of this step.
3. Due to evaporating the ether in a water bath, the anhydrous sodium sulfate was removed from the ether solution. Briefly explain why the sodium sulfate needed to be removed at this point and not later.
1. during extraction, the ether layer was washed with 2.0 mL saturated aqueous sodium chloride. Briefly explain the purpose of this step.
2. Following the saturated, NaCl wash, a small amount of anhydrous sodium sulfate was added to the ether. Briefly explain the purpose of this step.
3. Due to evaporating the ether in a water bath, the anhydrous sodium sulfate was removed from the ether solution. Briefly explain why the sodium sulfate needed to be removed at this point and not later.
Explanation / Answer
1. Wash with saturated aqueous sodium chloride is done to remove the water (if any) dissolved in the organic layer.
2. anhydrous sodium sulfate is used to remove the water dissolved in the solution containing desired organic product.
3. sodium sulfate is solid and must be filtered out of ether layer before putting on water bath for evaporation. If sodium sulfate is not removed, at the end of evaporation sodium sulfate will remain as a solid along with product and thus the obtained product will not be pure.
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