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Topic: factor of miscibility  (Read 1400 times)

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Offline antimatter101

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factor of miscibility
« on: November 02, 2012, 11:54:00 PM »
When I read upon miscible and imiscible ionic compounds I got very confused. While silver chloride (AgCl) cannot be dissolved into Ag+ and Cl- ions, sodium chloride can. And while calcium (II) oxide is soluble in water, magnesium oxide isn't.
I have no idea for this logic, and searching on google did not help. So can you help instead?
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Online Borek

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Re: factor of miscibility
« Reply #1 on: November 03, 2012, 04:43:21 AM »
Miscibility is a property of liquids, not solids. You are probably thinking about solubility. Don't expect an easy logic here, whether compounds are soluble or not is a complicated interplay between many effects.
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Offline Sircodekill

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Re: factor of miscibility
« Reply #2 on: November 03, 2012, 07:28:23 AM »
Well, just imagine that the Mg=O bond has too much strength to be dissolved by water or is more stable than aqueous Mg2+ ion.

Depends on several chemist factors such polarity, electronegativity difference, cell structure, bond distance, cation/anion size, lattice energy etc.
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