Lizzie asks…
Why does 1-butanol has a higher boiling point than diethyl ether?
Why does 1-butanol has a higher boiling point than diethyl ether? Which compound would you expect to be more soluble in water? Why?
weight loss cardiff answers:
1-butanol
OH
|
C-C-C-C
diethyl ether
CH3-CH2-O-CH2-CH3
a) * I (think) the answer to this lies in the hydrogen bonds from the OH group to other OH groups. It has been a while since I’ve had Organic Chem.
B) butanol.
C) the terminal OH group makes the ends more polar and more soluable in water
Carol asks…
Why are amines charged in a pH = 2 solution of diethyl ether and water?
Why are amines charged in a pH = 2 solution of diethyl ether and water, whereas alcohols and carboxylic acids are neutral? What determines if a substance will become charged or not in low or high pH? My organic chemistry book does not explain it well.
weight loss cardiff answers:
Amines, R-NH2, will in acid media pick up a proton to become R-NH3+
Acids, however, cannot absorb an H+; they release them. So in an acid medium, unless the acid in question is stronger it will not dissociate [much – use Ka if you need to get exact].
Alcohols do not generally pick up or discharge ions.
THis should have been covered in intro chem, and is assumed as background info in orgo
Helen asks…
Why is methanol more soluble in water than diethyl ether?
Is it just because the carbon chain is longer in diethyl ether?or are there other factors too?
weight loss cardiff answers:
Theres a saying that goes “like dissolves like”.
Water is a polar molecule, meaning it will dissolve other polar molecules more easily. By looking at the structure of each you can see that methanol is more polar than diethyl ether, largely because of OH group of methanol, in which the hydrogen atom is more easily detached.
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