GC question

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Troyvdg

Dentistry not Debtistry
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Suggest an experiment that could distinguish a polar compound from a ionic compound.

A. Observe if the compound is attracted to a magnet
B. Attempt to dissolve the compound in a polar solvent
C. Examine the compound with a microscope
D. Attempt to run an electrical current through a solution of each compound *answer
E. Determine the compound's melting point

I understand why D would work, but why wouldn't E?

The solution states that, "the mass of the compound also has a large effect, so melting point alone cannot tell a polar compound from an ionic one"
But melting point is an intrinsic property. So how would mass play a role in this? And since there is such a large difference between the melting points of covalent and ionic compounds couldn't this be used to distinguish between the two?

Thanks!
 
Hmm...only thing I can think of is that you could have a network solid that has polar bonds and a ridiculously high melting point. My DAT knowledge is slipping through my head daily though so I may not be the best to answer.
 
Hmm...only thing I can think of is that you could have a network solid that has polar bonds and a ridiculously high melting point. My DAT knowledge is slipping through my head daily though so I may not be the best to answer.

ahhhhh. true dat. forgot about those high m.p. b@stards. thanks👍

still though, the reason given to disregard E..is like 😕 haha
 
ahhhhh. true dat. forgot about those high m.p. b@stards. thanks👍

still though, the reason given to disregard E..is like 😕 haha
Yeah I read that after I tried to answer your questions and that is completely wrong haha.

Try to take someone elses word for it though. I don't really trust my knowledge anymore.
 
I'm an international student. i 've no clue about type of questions that can come in DAT exam. Like, in GC questions about radioactivity- half life, kinetics- rate law, salt formation- ph related, basically the questions that involve use of log 😕
Also i tried using chad's videos, but due to server connectivity these videos are only available in the states🙁
Please suggest an alternative or if someone could tell how to solve problems related to log.... It would be a great help.🙂
Thanks in advance!!!
 
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