There are some really really good treatises out there on fractional crystallization, and I'm ploughing through them one at a time.(adsbygoogle = window.adsbygoogle || []).push({});

One very basic thing has me confused, though: If you have 1 liter of water at 100C, it will dissolve 455g of NaCO3 or 1150 of KCO3, or pretty much any linear combination of those two. (The saturation curve is definitely nonlinear at lower temperatures, but that's not important for this question.)

Suppose I

1) put 1.5kg of each in a single flask,

2) intermix them carefully

3) add a liter of water

4) raise the combined temp to 100 degrees

5) let the system stabilize

6) draw off 100ml of clear fluid

Am I going to get

1) A saturated solution containing ONLY the most soluble salt

2) A combination of salts based on available amounts (50/50)

3) a mixture based on something else (temperature? atomic weight?)

Thanks for your time,

-Jeff Evarts

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# Distributions within saturated solutions

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