During the Grignard lab, it was important to use freshly opened diethyl ether an

Question

During the Grignard lab, it was important to use freshly opened diethyl ether and to make sure that the cap was securely on when the ether was not in use. Which reason below is the most important reason for doing this? a)Open diethyl ether will evaporate so fast that there won't be enough solvent for all of the reactions for all of the students in the lab. b)Open diethyl ether will absorb oxygen from the atmosphere and the oxygen will oxidize magnesium metal. c)Open diethyl ether will absorb nitrogen from the atmosphere and the nitrogen will bind to the magnesium through its lone pair, rendering it less effective. d)Open diethyl ether will absorb water from the atmosphere and this water will immediately react with any Grignard reagent that is formed. 13) 2. 51 g of acetic acid (CH_3COOH) is esterified under acidic conditions in the presence of an alcohol. The theoretical yield of the ester product is 5. 69 g. Based on this information, what is the molar mass of the alcohol used? 14) If the alcohol in the previous problem contains only C, H and only one 0 atom, draw one possible structure. 15) Fischer esterifications are one of the few organic reactions that can be performed in acid but cannot be performed in base. Why? a)An acid base reaction that is irreversible occurs first. b)Hydroxide is not nucleophilic enough to initiate the reaction. c)Carboxylic acid solubility is PH dependent. d)Base deprotonates the alcohol and causes alkoxide salts to precipitate. e) A reason that is not listed above.

Explanation / Answer

12)

The correct option is,

d. Open diethyl ether will absorb water from the atmosphere and this water will immediately react with any grignard reacgent that is formed.

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