If two solutions with different densities are placed in a glass, and they form two layers, does this mean they are not soluble?
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"Suppose that I don't have a formula for #g(x)# but I know that #g(1)
= 3# and #g'(x) = sqrt(x^2+15)# for all x. How do I use a linear approximation to estimate #g(0.9)# and #g(1.1)#?"
1 Answer
Jan 29, 2016
They are not mutually soluble. Solvents that form two layers are called
Explanation:
Hexanes and water, diethyl ether and water, methylene chloride and water, are IMMISCIBLE. There are many other examples. They form 2 separate layers, with the most dense solvent on the bottom. (There will be some water dissolved in the so-called organic layer, and some organic solvent in the water layer, but there will still be 2 bulk phases).
In the laboratory, often a solute is "partitioned" across 2 such phases. Organic solutes are collected in the organic layer, and inorganic solutes (ions etc.) are collected in the aqueous layer. Such a process is called "solvent extraction".
