John asks…
which of the following compounds can exhibit hydrogen bonding?
Methane
acetic acid
diethyl ether
DNA
Or is there more than one answer?
weight loss cardiff answers:
DNA uses H-bonding to hold the left/right sides to each other so it can be double-stranded.
Methane’s hydrogen atoms are bonded covalently. Carbon and Hydrogen are fairly close in electronegativity, so no H-bonding occurs.
Diethyl ether (ethoxyethane) is along the same lines as Methane – the H atoms are attached to C atoms – no H-bonding should occur.
AcOH (acetic acid) however, has an alcohol group (OH) where the O atom pulls the electron away from the H most of the time giving the H atom a (slightly) negative charge. It is possible that some H-bonding occurs.
Ruth asks…
Where can I get a good non-polar solvent?
I need a nonpolar solvent for some experiments I want to do. My hardware store doesn’t carry hexane or toluene or diethyl ether. Is turpentine nonpolar? What about xylene? Methyl ethyl ketone? I could buy online but I want to avoid that. Any ideas?
I know about the dangers and I have adequate ventilation.
weight loss cardiff answers:
Turpentine would be non-polar – don’t breath the fumes or get near flame!!
Xylene is also non-polar use same cautions
Mary asks…
Which of these substances is safe to pour down the drain?
I have a question regarding an organic chemistry laboratory course:
Napthalene
Benzoic Acid,
Ether (Diethyl ether)
Cyclohexane
Sodium Hydroxide
Thank you.
weight loss cardiff answers:
Sodium hydroxide with lots of water. It’s used in Drano, so it’s pretty safe.
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