MeshPL
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How many separate liquid phases?
Here's a non-trivial question:
How many separate liquids there can be, neither of which is soluble in one another? Simply: how many separate liquid phases there can be?
At least 4: water, hydrocarbon, perfluorohydrocarbon and mercury. If I remember well gallium and mercury do not mix, what rises the number up to 5,
assuming not room temperature, but a close one.
Try to assume room temperature and pressure.
Any ideas?
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phlogiston
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Is it a requirement that they separate spontaneously after mixing, or is it ok to layer different immiscible liquids on top of each other?
If so, one can imagine alternating layers of polar and nonpolar liquids with gradually lower densities.
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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MeshPL
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let's say they should none of them should mix
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chornedsnorkack
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Which metals could be alloyed in gallium so as to lower its melting point below room temperature, without making it miscible with mercury?
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unionised
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Cyclohexane, acetonitrile water(saturated with salt), perfluorocarbon, mercury.
(I suspect gallium mixes with mercury but if not, that's another layer).
This talks of a gallium amalgam with mercury.
http://pubs.acs.org/doi/abs/10.1021/ja01533a012?journalCode=...
If you use Na2SO4 ratehr than NaCl you can add a little CuSO4 as a "dye" . Carotene dissolves preferentially in the cyclohexane; and it's probably not
to difficult to find a polar but non-ionic dye that colours the acetonitrile.
[Edited on 19-7-15 by unionised]
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j_sum1
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Could you add a deep eutectic salt as another layer in here somewhere? Or is it likely to be water soluble?
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chornedsnorkack
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Gallium and mercury have noticeable but limited mutual solubility below 202 degrees. Saturated solution of Hg in Ga lowers the melting point of Ga by
2 degrees, to 27,7 degrees.
In and Ga are freely miscible, and eutectic temperature is 15,3 degrees. Could not find In-Hg phase diagram quickly.
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