All Questions
Tagged with intermolecular-forces polarity
14 questions
7
votes
1
answer
233
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Cyclodextrins: Is there really a hydrophobic interior and hydrophilic exterior?
I do not get most of the explanations on why cyclodextrins are so good at hosting hydrophobic molecules. It is true that the hydroxyl groups are pointed outwards and thus the cavity is definitely less ...
- 85
-1
votes
1
answer
47
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Is a microplastic saturated ferrofluid polar or nonpolar? [closed]
In my experiment (Junior science fair) I submerged a magnetic chip collector holding my ferrofluid (magnetite and grape seed oil) with polypropylene beads (attracted as part of the experiment) into ...
- 9
1
vote
0
answers
51
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Air/Acetonitrile Interfaces
Say I drop some acetonitrile on a grounded surface and it forms a meniscus. The acetonitrile is in air. Lets forget about evaporation for the moment.
Will there be an interfacial dipole formed by the ...
- 648
21
votes
1
answer
4k
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Why is the boiling point of fluorine lower than that of oxygen?
Fluorine boils at -188.1 °C and oxygen boils at -183 °C, but shouldn't $\ce{F2}$ boil after $\ce{O2}$?
Despite being electronegative elements, both are nonpolar molecules and posses dispersion forces ...
- 1,582
4
votes
1
answer
694
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Why is casein hydrophobic?
According to this source hydrophobic behaviour occurs when a molecule does not have a charge or is neutral and therefore cannot be attracted to the negative nor positive parts of water. Casein has an ...
- 640
1
vote
2
answers
1k
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Do molecules with polar bond, but with no dipole moment experiences a greater effect from the london dispersion forces?
Do molecules that have polar bonds and a structure that makes the polarity of those bonds cancel each other out, experience a greater effect from the London dispersion force, than molecules with a ...
- 55
7
votes
1
answer
7k
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Why do chloroform and benzene exhibit negative deviation from Raoult's law?
Chloroform is a polar molecule, and benzene is nonpolar. Shouldn't the chloroform-chloroform and benzene-benzene intermolecular forces be stronger than chloroform-benzene interactions (like dissolves ...
user28295
1
vote
1
answer
25k
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How to determine relative polarity (basic procedure)? [closed]
I am taking AP Chemistry, and have noticed that I can identify a polyatomic polar molecule, but struggle to determine which molecule is the most polar given a set of several polar molecules.
What ...
- 69
2
votes
1
answer
7k
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Why is the polar-nonpolar electronegativity difference defined to be 0.4?
In introductory college chemistry, bonds between elements that have an electronegativity difference $\Delta EN > 0.4$ are generally consider to be polar (and thus have a dipole moment), while $\...
- 23
2
votes
0
answers
595
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Boiling point and Intermolecular forces
After looking for proper reasons for boiling point orders, nobody could even explain why $\ce{CCl4}$ has a higher boiling point than $\ce{SiCl4}$, but after looking for patterns, in lots and cases of $...
- 1,185
7
votes
4
answers
40k
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Why is tetrafluoromethane non-polar and fluoroform polar?
Consider the Lewis dot structures of the molecules fluoroform, $\ce{CHF3}$, and tetrafluoromethane, $\ce{CF4}$:
My first line of thought is that both of these molecules are symmetrical (the ...
- 469
2
votes
2
answers
28k
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How do I figure out the relative polarity of organic compounds?
It's a question on my quiz which I guessed right and couldn't do the reasoning:
Based on the intermolecular forces, predict the boiling points of the following substances and list them in the order ...
- 97
5
votes
2
answers
79k
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What type of intermolecular forces will dominate Diethyl ether?
Is Diethyl ether (also known as ethyl ether) a polar molecule? What type of intermolecular forces dominate it? Dipole-Dipole Interactions, London Dispersion Forces or Hydrogen Bonding? Please Explain.
- 367
1
vote
1
answer
1k
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Why are the vinylic bonds in alkenes slightly polar?
when searching in the internet about why are alkenes more polar than alkanes (but still they are non-polar), they are always saying that the double bond is more polarizable , i understood the whole ...
