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Solubilities of the following compounds?
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Topic: Solubilities of the following compounds? (Read 2033 times)
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khourygeo78
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Solubilities of the following compounds?
«
on:
February 07, 2017, 08:08:34 AM »
Hello,
What are the solubilities of:
Iron, copper, lead acetates in hexane, DCM, acetone, ethanol and other volatile solvents like these?
What is the probably best organic solvent for these acetates?
Thanks
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billnotgatez
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Re: Solubilities of the following compounds?
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February 07, 2017, 09:00:56 AM »
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horse
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Re: Solubilities of the following compounds?
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Reply #2 on:
February 11, 2017, 12:23:13 PM »
I don't have the answer but heres what I'd look at for clues.
First thing to look at is the anion. What do you know about acetate as an anion? What do you know about acetic acid? Its really good at forming hydrogen bonds due to its carboxyl group. Acetate is an organic anion, but the organic part of it is pretty small so that carboxylate portion of the anion is left pretty exposed. Acetate anions always forms water soluble salts no matter what the cation is. Thats because they're good at forming hydrogen bonds. So with that in mind, you know that you have an anion which is good at dissolving in water and other hydrogen bonding solvents. Big hint there, only one of the solvents in your list can form hydrogen bonds. The most polar one.
Then consider the metals. I'm just guessing here, based on my understanding of chemistry so I could be wrong on some of this. An important factor now is how strongly is the metal binded to the acetate ions? The stronger the ionic bond, the less polar in water and aqueous solvents. And then how many acetate anions is the metal bonded to? More acetate ions means more soluble in water. So you need to look at the electron configuration of the metals. More acetate ions means more soluble in water.
I don't really know too much about solubility of heavy metals by themselves. I can't really say much more than that.
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AWK
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Re: Solubilities of the following compounds?
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Reply #3 on:
February 11, 2017, 12:47:18 PM »
Ionic salts are generally poorly soluble in nonpolar solvents. So you may expect that these salts may be better or less soluble in ethanol.
I know some compounds (formally salts but covalent ones: ((((CH
3
)
3
)CO)
3
SiS)
n
Me - n depends on metal valency) that practically for all metals show fantastic solubility in all nonpolar solvents, for example hexane.
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Solubilities of the following compounds?