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Chem help?

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asdfdsa
Posts: 1268 - Karma: 13
Here they are:

6 ) iii. Discuss the relative polarity of each of the following molecules and circle the polar ends in each of the molecules if applicable

6 ) iv. Discuss the relative solubility in water of each of the molecules

Molecules: Glucose, Caffeine, and Sodium citrate. Included pics below.

What I need, is for you guys to help me answer these questions, by either taking the pic, drawing what is needed on it, and putting it back here, or telling me what I need to do. Any help would be greatly appreciated, thanks a ton.

Glucose:
Click for larger image

Caffeine:
Click for larger image

Sodium citrate:
Click for larger image
May 5 2009 10:49PM
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no_steeze
Posts: 23992 - Karma: 4,267
just looking at this makes me depressed
i hate chem so much
May 5 2009 10:51PM
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Slinger1x1
Posts: 8853 - Karma: 65
im in chem, we never did this
May 5 2009 10:53PM
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asdfdsa
Posts: 1268 - Karma: 13
Also hate it, regret taking it soooooooo much.

But I need to get past this, this is the worst stuff imo
May 5 2009 10:55PM
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artfullydodged
Posts: 8358 - Karma: 1,674
if you're getting these questions from a worksheet there's a good chance they're on wiki answers
May 5 2009 10:56PM
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Alex=God
Posts: 2422 - Karma: 139
I took chem last semester and the only thing i can honestly remember is a lab where we did something with sugars
May 5 2009 11:01PM
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freezed
Posts: 12973 - Karma: 500
more polar = less soluble in water. and deciding polarity should be easy if you have paid attention at all or are capable of reading your text.
May 5 2009 11:02PM
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chapz
Posts: 10182 - Karma: 66
k well for polarity...

look at fonclbrch
have you ever learned that? f being the most electronegative and h being the least. oxygen has a tight grip, so then you see a o-h bond, it is very polar. so, look at all the oxygen bonds, or any other in fonclbrch.

for the solubility

LIKE DISSOLVES LIKE
water has a tiny bit of dispersion, like every molecule, but its not the major force. the major force in water is ion dipole and h bonding. so out of the molecules given, look at their major forces. molecules that have majors in ion-dipole or hbonding will be soluble in water.

a molecule like hexane, that is pure dispersion, wont dissolve in water.
May 5 2009 11:05PM
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