Lisa asks…
What is the percent yield in this experiment?
Diethyl ether is made from ethanol according to the following reaction:
2 C2H5OH —> (C2H5)2O + H2O
In an experiment starting with 517 gram of ethanol gave 391 gram of diethyl ether. What was the percent yield in this experiment.
weight loss cardiff answers:
MM of ethanol = 46.068 g ; moles = 517 / 46.068 = 11.22
moles of ether expected from the equation = 5.611
MM of the ether = 74.12 g ; moles = 391 / 74.12 = 5.28
% yield = 5.28 / 5.56 = 95.0%
good result !!!
Donald asks…
WOW, what ether is the kind people used to drink?
There is to many types and I am doing research.
What kind is the drinkable kind?
Plain ether or something like diethyl ether?
weight loss cardiff answers:
No ether can be safely taken orally. Diethylether used to be an anethestic, but was inhaled. Ethyl alcohol is the drinkable ALCOHOL. The diethylether has the structure CH3-CH2-O-CH2-CH3; the alcohol CH3-CH2-OH.
George asks…
What is the reason for the fact that the solvent used in an extraction should have relatively low b.p.?
What do you think is the reason for the fact that the solvent used in an acid-base extraction should have relatively a low boiling point?
Also, suppose you used dimethylformamide (a more polar and high boiling solvent) instead of diethyl ether, what would happen to the extraction process? (the compounds to be isolated are benzoic acid, 4-chloroaniline and napthalene).
Thanks so much!
weight loss cardiff answers:
The use of a solvent with lower boiling point is more adviceable for the extraction purposes. Suppose you are already finished the solvent extraction and want to eliminate the solvent from the extract. You are just going to heat it and since the solvent has lower boiling point than the pure extract, it will evaporates first leaving the pure extract.
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