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Topic: solubility of substances in water  (Read 8086 times)

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Offline 00000

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solubility of substances in water
« on: April 02, 2008, 08:19:17 PM »
this is an extra credit question, I searched the net and this forum and could not find an answer that was really related:


solubility g/100g water

MgCl2 (s) magnesium chloride = 54.6
NH3 (g) ammonia = 34.0
CH3CH2OH (l) ethanol = infinite
C6H5COOH (s) benzoic acid = 0.29

Which of the substances can act as either the solute or the solvent when mixed with  100g water at 20 degrees c?


as a wild guess, I would say ethanol.
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Offline Arkcon

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Re: solubility of substances in water
« Reply #1 on: April 02, 2008, 09:20:54 PM »
Why?
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline 00000

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Re: solubility of substances in water
« Reply #2 on: April 02, 2008, 09:29:26 PM »
the infinite value. I really don't understand this, could you explain it please?
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Offline Arkcon

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Re: solubility of substances in water
« Reply #3 on: April 02, 2008, 10:11:26 PM »
Good, it's the only one that different in the multiple choices, so you know it must be correct.  Now, what's the definition of solute and solvent?
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline 00000

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Re: solubility of substances in water
« Reply #4 on: April 02, 2008, 10:17:42 PM »
solvent = what it is dissolved in
solute = what is dissolved

I think I a most confused by "either the solute or the solvent". how can it be both?
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Offline Arkcon

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Re: solubility of substances in water
« Reply #5 on: April 02, 2008, 10:26:23 PM »
How does infinite solubility help?   Try various percentages in your head and see if the answer strikes you.
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Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline 00000

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Re: solubility of substances in water
« Reply #6 on: April 02, 2008, 10:28:37 PM »
Maybe I'm stupid - the percentage of what?
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Offline AWK

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Re: solubility of substances in water
« Reply #7 on: April 03, 2008, 01:09:19 AM »
Quote from: 00000 on April 02, 2008, 09:29:26 PM
the infinite value. I really don't understand this, could you explain it please?
Infonite means exactly wat this term means.
Have you ever seen ethanol separated from water in glass?
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AWK
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