During the procedure some water was added to the initial reaction mixture. Why w
ID: 1413339 • Letter: D
Question
During the procedure some water was added to the initial reaction mixture. Why was it necessary to add water at this point? How might the yield of 1-bromobutane be affected if the water were not added, and what product(s) would be favored? How might the yield of product be affected by adding twice as much water as is called for while keeping the quantities of the other reagents the same? In the purification process, the organic layer is washed with 2 M NaOH and then with saturated sodium chloride solution. What is the purpose of each wash? After the washes described in question 2, the 1-bromobutane is treated with anhydrous Na_2SO_4. Why is this done?Explanation / Answer
1) a) It is necessary to add water to step up the reaction rate .
b) If water were not added product formed would be very very less and at a very slow rate . Bromine gas would be favoured as product .
c) If twice much water is added , product formed would be four times at double of the original rate .
2) Purpose of each wash is to remove the acidic content of the salt .
3) This is done so that administration does not disturb normal electrolyte balance and does not lead to absorption or excretion of water and ions . Sodium sulfate anhydrous disassociates in water to provide sodium ions and sulfate ions.
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